The United Kingdom’s Human Rights Act as a Catalyst of Constitutional Migration: Patterns and Limitations of Rights Importation by Design

The United Kingdom Human Rights Act 1998 – Constitutional migration – Impacts of legislative design and process on the internalisation of international standards – A taxonomy of migratory patterns under the Human Rights Act – Constitutional migration as a source of constitutional instability – Proposals for a British Bill of Rights

statutory interpretation, 3 the activities of public authorities, 4 and (indirectly) in litigation between private parties. 5 Given this undeniable reachand for the reason that the Convention rights could not be routinely relied upon in domestic litigation prior to the Act's implementation 6the Human Rights Act was said to hold the potential to 'subject the entire legal system to a fundamental process of review and, where necessary, reform' 7 by reference to previously 'external' norms enforceable only against the state. Importation of the 'Convention rights' and the influence of their attendant case law provided the central pillar of this new architecture. The Act has generated a substantial literature relating to both its constitutional 8 and substantive 9 effects. Despite thisand although the Act manufactured a significant ingress of externally-generated standards into the national legal systemthe Human Rights Act has not been the subject of sustained examination as an explicit prompt of constitutional migration. 10 This piece seeks to address that lacuna through examination of the United Kingdom's Human Rights Act experience as precipitative of the movement of constitutional norms across jurisdictional boundaries. 11 Focusing primarily on the (vertical) importation of European Convention on Human Rights influences into the domestic order, the piece examines the design of the Act, and the process of constitutional exchange it prompts, identifying trends in judicial reasoning which variously emphasise: (i) the extent to which the Convention rights have 3 Ibid., ss. 3 and 4. 4 Ibid., s. 6. 5 Ibid., s. 6(3). Though the Human Rights Act does not create new causes of action permitting reliance on the Convention rights in common law litigation between private parties, the duty on the courts as public authorities themselves has led to existent causes of action being interpreted and applied in a manner consistent with the Convention rights (on which see G. Phillipson and A. Williams, 'Horizontal Effect and the Constitutional Constraint', 74(6) MLR (2011) p. 878). 6 R v Secretary of State for the Home Department, ex p. Brind [1991] 1 AC 696. 7 R v Director of Public Prosecutions, ex p. Kebeline resulted in the internationalisation of domestic law; (ii) an opposing trend towards emphasising the continuing municipality of UK human rights law; and (iii) a liminal approach whichin keeping with the objectives of the Act's framers and with the subsidiary position of national authorities vis-à-vis the Strasbourg courtenvisages the interactions between domestic law and the Convention jurisprudence as a dialectical process. Finallyagainst the backdrop of repeated efforts to unpick the connection between domestic and international human rights norms in the UKthe piece examines the constitutional migration engineered by the Human Rights Act as a source of ongoing instability in the UK's human rights project.
Examination of the Human Rights Act as a catalyst of constitutional migration serves a number of objectives. First, it provides a counterpoint to accounts of constitutional migrations which exclude the importation by state institutions of authorities from international law on the basis that the latter are 'deemed to be held in common'. 12 Secondly, it will enrich discourse on constitutional migration by elaborating the predominant approaches taken to rights-importation under the Human Rights Act model by UK judges. Thirdly, recognition of the Act as a driver of constitutional migration will, in turn, support the situation of the UK's experience within the broader literature concerning the transnational influences of legal authorities and norms.
An examination of this sort is particularly appropriate at the current juncture. The coming into force of the Human Rights Act was a landmark in the 'Europeanisation' of UK constitutional law. 13 The early years of the twenty-first century have since been punctuated by occasionally fractious, and now fractured, relations between UK and European institutions. 14 Brexit marks a significant point of departure from the integrative patterns which characterised the late twentieth and early twenty-first century experience of international norms in UK constitutional law. And while the UK remains formally committed to ongoing membership of the European Convention system, 15 the Human Rights Act remains subject to political opposition, with the specific linkage it establishes between the European Court of Human Rights (and that Court's jurisprudence)the nature of which characterises the migrations initiated by the Acta topic of recurring controversy. 16 T H R A       Constitution migration is one of several metaphorsalong with constitutional transplants or constitutional borrowingcommonly employed to articulate the movements of legal standards between jurisdictions. Amongst these labels the metaphor of constitutional migration is apposite in relation to the Human Rights Act experience; the 'fluidity' 17 of the idea of migration permits its use as an encapsulation of multi-directional 'movements across systems' that might beamong other things -'overt', 'incremental', 'planned,' 'adopted or adapted' or concerned with institutional competence, constitutional design or attitude. 18 The idea of migration isin the context of analysis of the changes initiated by the Actto be preferred to its alternatives. The metaphor of 'transplantation' is excessively rigid and (as we will see below) fails to capture the extent to which the Human Rights Act framework adapts and provides for the domestic deployment of the Convention rights. 19 The notion of 'borrowing', meanwhile, is suggestive of both a relatively linear process and of a constitutional movement subject to temporal limitation. 20 Neither alternative effectively captures the interdependency which characterises the relations between the European Court of Human Rights and its member states. 21 It is also apparent that the design of the Human Rights Act reflected motivations for constitutional migrations that are evident elsewhere. Perju has summarised three core stumuli for such constitutional movements, labelling them 16 Commission on a UK Bill of Rights, A UK Bill of Rights? The Choice Before Us (December 2012); Independent Human Rights Act Review, Terms of Reference, available at 〈https://assets. publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/953347/humanrights-review-tor.pdf〉 visited 1 February 2023; Ministry of Justice, ibid. functionalist, reputational, and normative (or universalist). 22 Each is visible in the design experience of the Act. First, enactment of the Human Rights Act was a functionalist, or essentially pragmatic, step; the UK had been a state party to the European Convention on Human Rights since 1951permitting individual petition to the European Court of Human Right since 1966and was already bound as a matter of international law to uphold its terms. The UK's adherence to the Convention's requirements, the then Government argued therefore, demonstrated that the Convention rights represent 'tried and tested' standards, with which the 'the people of this country are plainly comfortable'. 23 Secondly, the reputational issue to be addressed via the enactment of the Human Rights Act can be found in the acknowledgement thatcontrary to the occasional protestations of the judges 24 domestic law's inability to respond to the demands of the Convention had contributed to the UK's (then) poor record before the European Court of Human Rights. 25 Finally, the Government acknowledged that the UK's failure to permit litigants to utilise the Convention rights in domestic courts left it a constitutional outlier amongst the member states of the Council of Europe: 'almost all' other member states, the Government suggested, had 'gradually incorporated [the Convention] into their domestic law in one way or another'. 26 In responding to this state of nonconformity with the majority of state parties to the European Convention on Human Rights, the Act's implementation of human rights norms can also be viewed as a migratory act designed to bring about a degree of constitutional convergence.
While the exchanges between national law and the Convention rights lie at the heart of the Human Rights Act 1998, the Act is in fact a component of a broader set of constitutional relationships. At the macro level, the Act can be positioned within late twentieth century cross-jurisdictional patterns of constitutionalisation, more specifically as a key illustration of the spread of 'new Commonwealth' model constitutionalism. 27 As such, the Act is part of the family of rights instruments 22 Perju, supra n. which reject the supremacy of judicial interpretations of individual rights and aspire to the coexistence of judicial review with the maintenance of a sovereign legislature. The structural approach taken by the Act to reconciling judiciallyprotected rights with the ongoing supremacy of statute owes much to its predecessor instruments the Canadian Charter of Rights and Freedoms and, in particular, to the New Zealand Bill of Rights Act 1990. 28 Both instruments employ mechanisms designed to uphold the primacy of legislative decisionmaking; the former via the adoption of a notwithstanding clause, 29 the latter through the direction that legislative interpretations should be consistent with the protected rights. 30 In turn, design features of the Human Rights Act have been further refined and adapted in the statutory Bills of Rights adopted in a number of Australian states, 31 and have been influential on judicial decisionmaking under the New Zealand Bill of Rights Act 1990. 32 As a tool of national constitutional law, the Human Rights Act exhibits a legislative policy choice in favour of internalising many of the (previously external) guarantees found in the European Convention on Human Rights, as well as directing that domestic adjudication relating to rights-compliance be guided by reference to the jurisprudence of the European Court of Human Rights. 33 The Act is therefore illustrative of a 'vertical' 34 migration from the supranational to the national in two core senses: first, it is the product of a design process focused upon the domestication of international human rights ('bringing rights home' in the words of the then UK Government 35 ); secondly, its operation in practice is (to potentially varying degrees) contingent on the influence of decisions of the European Court of Human Rights. 36  Human Rights Act 1998, s. 2(1): 'A court or tribunal determining a question which has arisen in connection with a Convention right must take into account any [judgments of the European Court of Human Rights or decisions of the Strasbourg organs] whenever made or given, so far as, in the opinion of the court or tribunal, it is relevant to the proceedings in which that question has arisen'. of constitutional importation are also potentially visible. The jurisprudence of the European Court is, of course, parasitic upon the legal systems of the Convention's member states; both individual judgments and the direction of the Court's jurisprudence broadly considered respond to developments in states within the Court's jurisdiction. 37 As McCrudden has observed, the reliance placed by the European Court on consensus across the member states inamong other thingsestablishing whether a purported limitation on rights is necessary in a democratic society means that 'comparative method is : : : explicitly built into the fabric' of its decision-making. 38 In consideringor 'taking into account'decisions of the European Court of Human Rights, UK courts are themselves facilitators of a more complex (potentially pan-European) form of constitutional migration. This form of migration may be either be directinvolving UK courts reasoning by reference to decisions of other national courts in adjudication concerning the Convention rights 39or indirectusing the comparative and/or consensus analysis carried out by the European Court of Human Rights as a proxy for engagement with the rights jurisprudence of other member states. 40 Either way, UK courts might play a role in facilitating the movement of constitutional reasoning from one state party into the jurisprudence of another (potentially via adjudication at the European Court of Human Rights).
The further consequence of domestic courts' obligation to 'take into account' decisions of the European Court of Human Rights in domestic litigation is an increased propensity for the Strasbourg Court to, in turn, rely on and engage with decisions of the UK courts in its own decision-making. Again, this form of constitutional exchange was anticipated by the architects of the Act: 'British judges will be enabled to make a distinctively British contribution to the development of the jurisprudence of human rights in Europe'. 41 This upward flow of constitutional influence from domestic human rights decisions back to the Strasbourg courtwhile often expressed as a 'dialogue' between national and supranational institutions 42falls within the dynamic exchanges contemplated by the migration metaphor. For instance in relation to domestic application of the proportionality test, where the jurisprudence of the Bundesverfassungsgericht has proven influential (see R (Keyu)  Indeed, such exchanges are essential to the Convention system, given the European Court's view that the ' : : : the machinery of protection established by the Convention is subsidiary to the national systems regarding human rights'. 43 Though the focus of this piece is on the director 'vertical'influence of the Convention rights in domestic law, the Human Rights Act provides on closer inspection an example of what Slaughter categorises as 'mixed vertical-horizontal communication' 44 though which constitutional norms are both disseminated and distilled via a feedback loop established between international and national institutions.

Design
It might be tempting to categorise the design and implementation of UK's Human Rights Act as an instance of constitutional transplantation, given that the domestic application of the pre-existing European Convention standards was the primary objective of the implementation exercise. The term 'transplantation', however, suggests both a wholesale adoption of the Convention into domestic law, and a displacement of those municipal protections for human rights which pre-dated the Human Rights Act. Neither suggestion is accurate (though, as we will see, both feed into political debates surrounding the future of the Act).
As to the first, the UK's dualist system required that the Convention rights be translated into domestic law by statute to be enforceable in domestic litigation. The Human Rights Act uses the Convention rights as the structural underpinnings of a framework which provides for statutory compliance with those rights, public authorities' obligations in relation to those rights, remedies for breaches of the protected rights, and so on. The Convention rights do not have direct effect in domestic lawtheir purchase in the domestic sphere is contingent on the operation of the Act's core provisions (sections 3, 4 and 6)and nor do they apply in the manner of binding precedents. 45 The Act also gives only partial effect to the European Convention on Human Rights in domestic law: neither the preamble to the Convention nor Article 13 are given effect. Both omissions provide evidence of 'constitutional nonborrowing' 46the deliberate choice not to adopt or adjust a particular external constitutional authority or provision. This adaptation, particularly in relation to the failure to give domestic effect to the right to an effective remedy, was required in order to preserve the legislature's (sovereign) right of inaction in the face of a declaration of incompatibility. 47 In addition to these modifying measures, the place of the Human Rights Act on the 'New Commonwealth' continuum further illustrates that it is misleading to simply view the Act as serving to import European constitutional influences into the UK's domestic system. As Lord Hoffmann therefore recognised in McKerr, to say that the Act straightforwardly 'incorporated' the Convention into domestic law fails to recognise more complex constitutional dynamics. 48 Secondly, nor did the Human Rights Act displace pre-existing protections for human rights in domestic law. Indeed, the Act specifically provides that a litigant's reliance on the Convention rights will not limit access to any other legal right they may enjoy in domestic law. 49 Instead, the Act operates as a constitutional overlay, subjecting domestic lawfor the most part 50to the meta-condition of Convention-compliance. The statute book was made subject to the Act's interpretative clauses, allowing judgesin cases of incompatibility with the Convention rightsto achieve compliance through interpretation 51 or to issue a declaration of incompatibility 52 resulting in remedial responsibility for the alleged inconsistency reverting to the elected branches. 53 Pre-existing protections for rights existent at common law also survived enactment of the Human Rights Act; common law causes of action are rendered susceptible to judicial development in the light of the requirements of the Act, and common law rights have latterly served as influential foils to the more substantial and wide-ranging protections afforded by the Convention rights. 54 As the UK Supreme Court has recognised, the common law did not ossify as a source of rights protection on the enactment of the Human Rights Act. The Act retainsor at least envisagesthe ability of Parliament to legislate in apparent contravention of the Convention's requirements (s. 19) and places neither Parliament nor government under any legal obligation to remedy a judicially-identified incompatibility between statute and the Convention rights (s. 4(6)). 51 Human Rights Act 1998, s. 3(1). 52 Human Rights Act 1998, s. 4(2). 53 Human Rights Act 1998, s. 10 (and see also Human Rights Act 1998, s. 4(6)).

Process
In practice, the framework established by the Human Rights Act facilitates an ongoing process of migration via the stipulationin section 2(1) of the Actthat domestic courts 'take into account' Strasbourg jurisprudence in adjudication in which the Convention rights are engaged. 56 From the point at which the Act became operable, domestic courts were able to draw upon the corpus of Strasbourg case law -'whenever made or given'in domestic adjudication concerning the Convention rights. That considerable discretion was afforded to domestic courts to consider, or be to some extent influenced by, 57 Strasbourg decisions is illustrated by the fact that the Act stipulates only that the Convention case law be 'relevant' to the domestic dispute.
The open text of section 2(1) implicitly acknowledges that while some Strasbourg jurisprudence may be relevant to the resolution of the domestic dispute it may require modification by domestic judges or may not be strictly applicable for reasons of, inter alia, institutional competence. It suffices at this point to note that the task for UK courts in integrating the Convention rights into domestic law was not likely to be a mechanical exercise. For both methodological reasonsincluding that the Strasbourg court's decision-making is not governed by a principle of stare decisis 58as well as on substantive groundsincluding that certain principles employed by the Strasbourg court result from its pan-jurisdictional institutional position 59preserving a sphere of domestic judicial discretion was an essential pragmatic step. As Colin Warbrick has written, in the process of utilising the Convention jurisprudence at the domestic level, The Human Rights Act provides legislative licence to a potentially variableor fluidform of constitutional migration, with judicial responses to the section 2(1) obligation conditioning the extent to which the importation of Strasbourg case law directs, influences or is merely considered in the process of articulating the Convention right's requirements at the domestic level. Judicial interpretations of the requirements of section 2(1) haveover timeshaped the extent to which the Strasbourg case law penetrates and influences the domestic sphere.
A       H R A While the application of the Human Rights Act has impacted across a wide range of fields, the importation process has not followed a linear pattern. Three distinct modes of migration are observable: a trend of strong adherence to the Strasbourg case law, resulting in an internationalisation of domestic law; a counter-trend, emphasising either the status of the Act as a domestic instrument or the rights-protecting capacity of municipal law; and a liminal approach which promotes a dialectical relationship between domestic laws and Convention norms. While the first two trends, respectively, maximise and minimise the capacity of the Human Rights Act to act as a driver of constitutional migration, the third approach represents a mode of migration better equipped to deliver Convention-consistent protections without sacrificing the integrity and distinctive character of the national legal system.

Internationalisation
The internationalisation of the UK's emerging human rights protections driven by, and articulated in close accordance with the jurisprudence of, the Strasbourg Court was suggested by the early Human Rights Act case law. This internationalisation saw the Human Rights Act's protections closely track those afforded by the Strasbourg court in terms of their substantive content and remedial scope. As to the former, Lord Bingham in Ullah found that domestic courts were under a duty to 'keep pace with the Strasbourg jurisprudence as it evolves over time: no more, but certainly no less'. 61 As to the remedial scope of the Act, Lord Nicholls in Quark said the following: The [Human Rights] Act was intended to provide a domestic remedy where a remedy would have been available in Strasbourg. Conversely, the Act was not intended to provide a domestic remedy where a remedy would not have been available in Strasbourg. 62 Both stipulations view the purpose of the Human Rights Act as giving 'effect in domestic law to an international instrument : : : which could only be authoritatively interpreted by the Strasbourg court'. 63 The resulting practical reflection of the Strasbourg jurisprudence in domestic law was underpinned by a normative view that there should be a clear 'correspondence' between the rights available domestically via the Act, and those as articulated in the jurisprudence of the Strasbourg court. 64 The 'internationalist' 65 vision of the Human Rights Act represents an understandable strategy in the light of the transformative potential of the Act; an explicit objective of the Act was, after all, to give 'further effect' to European Convention rights in domestic law. Given the functionalist objectives behind the enactment of the Act, close adherence to the Convention case law also acted as a counter to accusations of excessive judicial activism or unwarranted creativity on the part of domestic judges as the Act bedded down. The relative stability provided by 'mirroring' 66 the requirements of the Convention rights in domestic law, provided predictability during the period following implementation. 67 Given that judicial consideration of external authorities is not only mandated by, but an essential component of the Human Rights Act architecture, the archetypal concern regarding constitutional migrationsthat they 'facilitate the erosion of sovereignty' by transforming courts into 'agents of outside powers' 68remains pertinent. While experiences of constitutional borrowing elsewhere have been used to enhance the legitimacy of local judicial decision-making, the closealmost precedential 69adherence to the Strasbourg jurisprudence that typified the Act's early life prompted legitimacy concerns of a different order.
This internationalist reading of the courts' obligations under the Act tended towards emphasising the essentially determinative status of the Strasbourg case law in domestic Human Rights Act disputes andin turnthe position of 62 the Strasbourg court as the ultimate authority responsible for the interpretation of the Convention's requirements. 70 Though section 2(1) provides that domestic courts are not bound to follow the Convention case law, the combined effects of the United Kingdom's international obligations under the Convention and section 6(1) of the Actwhich positions courts themselves under an obligation to act compatibly with the Convention rightsresulted a strong judicial presumption that clear and consistent lines of Strasbourg authority should be followed. Such an approach was entirely consistent with the functionalist objectives of the Human Right Act, and indeed remains a governing principle of the UK Supreme Court's approach to construction of the Convention rights. 71 The structure of the Human Rights Act suggested that constitutional transplantation was an overly simplistic encapsulation of its intended effects, yet the dominant approach of appellate courts during the Act's lifespan has confirmed a clear tendency towards the adoption of applicable Strasbourg jurisprudence via the vehicle of the Act. 72 Rather than seeing the Convention rights 'woven into' domestic law as the Act's parent administration had hoped, 73 this approach gave rise to suggestions that the Convention rights were alien impositions 74 andunfortunatelychimed with caricatures of expansionist, imperialising decision-making by the European Court of Human Rights. 75 It is undeniable that the approach has also contributed to the political instability of the Human Rights Act 1998, and what the current UK Government regards as 'an over-reliance on Strasbourg case law'. 76

Municipality
At the opposing end of the spectrum, a number of approaches have sought to emphasise the national character and properties of the Human Rights Act and 70  its attendant rights, and to correspondingly curtail the inward migration of constitutional influences from the European Court of Human Rights. Both involve domestic courts approaching their rights protecting functions as a distinctly domestic enterprise. The first of these approaches invokes a dualist conceptualisation of the Human Rights Act as a conspicuously national instrument. Following the implementation of the Act, Lord Hoffmannin McKerrdescribed the Act as a direction to courts to apply a distinctly national scheme of rights protection:

R (Animal Defenders
What the Act has done is to create domestic rights expressed in the same terms as those contained in the Convention. But they are domestic rights, not international rights. Their source is the statute, not the Convention : : : their meaning and application is a matter for domestic courts, not the court in Strasbourg. 77 This approachexpanded upon extra-judicially as a theory of human rights that are 'universal in abstraction but national in application' 78maintains a clear division between the national and the international dimensions of the United Kingdom's rights regime; although the Human Rights Act adopts rights terminology which owes its heritage to the European Convention on Human Rightsand may be inspired in practice by the Convention case lawthe provisions of the Act have translated those rights into principles of domestic law, to be enforced by domestic courts. Hoffmann's perspective on the Human Rights Act minimises its external dimension; rights adjudicated upon in the domestic context are the products of legislative direction, not of an international agreement. While this distinction may appear somewhat artificialperhaps especially so in the context of an implementing measure which was explicitly contingent on an integral linkage between the domestic and international human rights regimesit sought to preserve those dualist elements of the constitution that the Human Rights Act threatened to dissolve, and in doing so emphasised that the role of the domestic courts was to enforce the Act itself, rather than to position themselves as domestic proxies for the Strasbourg Court. 79 A similar distinction was drawn by Lord Rodger in Animal Defenders International. In that decision, Lord Rodger noted that the Human Rights Actimplicitly at leastcontemplates the possibility of divergence between the views of domestic courts and European Court of Human Rights as to the requirements of the Convention rights. This is the case, Rodger continued, because the Convention rights have a dual status. As a result of the Act, the Convention rights are 'part of domestic law'; their meaning and application in this context fallssubject to legislative override or reversalto the UK apex court. By contrast, '[i]n so far as the articles are part of international law they are binding on the United Kingdom as a signatory of the Convention and the European Court is, for the purposes of international law, the final arbiter of their meaning and effect'. 80 It should be noted that, even if such dual status claims are accepted, the UK Supreme Court has recently cautioned against domestic courts adopting interpretations of the Convention rights which do not find support in the jurisprudence of the European Court of Human Rights. 81 The second municipalising approach involves affording a structural prioritisation to the common law (or broader domestic rights framework) in Human Rights Act decision-making. As we have already seen, implementation of the Act did not formally override pre-existing protections for rights in domestic law. Nonetheless, following implementation the Convention rights assumed the position as the primary tools via which individual freedoms might be protected. In the face of the 'catalogue of enforceable rights, (semi-)structured tests of necessity and proportionality, and remedial provisions provided by the Convention rights' 82 the comparative imprecision and remedial weakness of the common law saw itpost-implementation of the Human Rights Actpractically side-lined. 83 As political opposition to the internationalising tendencies of the Human Rights Act grew, the UK Supreme Court lamented that enforcement of the Act had led to a 'baleful and unnecessary' tendencyon the part of advocates and judges aliketo overlook the rights-protecting capacity of municipal law. 84 In a series of cases, the Supreme Court reasserted the place of common law rights as amongst the means by which individual rights might be vindicated in the UK system. A partial linkage with broader patterns of constitutional migration may be evident here. As McCrudden has noted '[t]he purpose of using foreign decisions is in order to fill a vacuum left by the absence of (preferred) indigenous jurisprudence. In this context, the assumption is that when national jurisprudence is sufficiently plentiful and sophisticated, the use of foreign law will decline significantly'. 85 An 'over-reliance' on the Strasbourg case law might be counteracted by a normative preference for reliance on indigenous common Kennedy v Information Commissioner, supra n. 55, [133]. 85 McCrudden, supra n. 38, p. 523. law authorities. In treating the common law's protections for human rights as being sequentially preferable to the Convention rights, 86 the trend towards deployment of the common law in rights adjudication is potentially inhibiting of the Convention's ability to permeate the domestic constitutional order. However, the common law's range of protected rights isat least in comparison to the catalogue of rights contained within the Convention and its protocolssomewhat limited, and lacks the legislative underpinning enjoyed by the Human Rights Act. 87 Moreover, the common law's rights jurisprudence functions primarily as a tool of statutory interpretation, which cannot resist incursions into the rights it recognises when those incursions are explicitly mandated by legislation. 88 As a result of this, the Supreme Court has recognised that -'although the Convention and our domestic law give expression to common values'the common law may not be the substantive equivalent of the Convention rights, and that where domestic law is incapable of providing a remedy 'effect must be given to the Convention rights in accordance with the Human Rights Act 1998'. 89 This statement makes clear thatconsistently with the traditional tendencies of dualismthe common law and Human Rights Act may be complementary, but they also remain distinct. Adopting an approach to rights adjudication which explicitly prioritises domestic sourcesto the potential exclusion of potentially applicable Strasbourg authoritieslimits the potential for the Convention to infiltrate the internal constitutional order.

Critical assimilation
Lying between the internationalisation and municipality approaches introduced above, some judges -Laws LJ initially chief among themsaw the enactment of 86 Masterman and Wheatle, supra n. 82, p. 59. Fundamental rights cannot be overridden by general or ambiguous words. This is because there is too great a risk that the full implications of their unqualified meaning may have passed unnoticed in the democratic process. In the absence of express language or necessary implication to the contrary, the courts therefore presume that even the most general words were intended to be subject to the basic rights of the individual. In this way the courts of the United Kingdom, though acknowledging the sovereignty of Parliament, apply principles of constitutionality little different from those which exist in countries where the power of the legislature is expressly limited by a constitutional document'. the Human Rights Act as a confirmation of the common law's burgeoning jurisprudence of constitutional rights, 90 and sought to explain the advent of the Act as an endorsement of a trend already evident in common law reasoning. On this view, the relationship between the common law and the Convention rights was to be substantively complementary, with the emergence of a 'municipal law of human rights' a product of the incremental blending of the two sources of rights jurisprudence. 91 This approach sought to portray the Convention case law and pre-existing common law rights jurisprudence as a part of a coherent whole and, as such, encouraged domestic courts: : : : not simply to add on the Strasbourg learning to the corpus of English law, as if it were a compulsory adjunct taken from an alien source, but to develop a municipal law of human rights, by the incremental method of the common law, case by case, taking account of the Strasbourg jurisprudence as [Human Rights Act] s. 2 enjoins us to do. 92 This vision of the courts' function under the Human Rights Act preserved the institutional autonomy of the domestic court in relation to human rights claims, denying that adjudication under the Act required the courts to play the role of 'Strasbourg surrogate'. 93 It simultaneously preserved the decisional autonomy of the domestic courts in the local application of the Convention rights, recognising that 'treating the [Convention] text as a template for our own law runs the risk of an over-rigid approach'. 94 As such, this liminal approach provided greater scope for principled departures from the Strasbourg case law while paving the way for the emergence of a dialectical relationship between domestic courts and the European Court of Human Rights.
The extent to which the external requirements of the Convention rights might infiltrate the UK constitution mightas a result of this approachbe militated by a number of potential factors designed to uphold the integrity of the national legal order. The Strasbourg jurisprudence may then not be determinative of a domestic dispute iffor instanceit were to compel an outcome which would be 'fundamentally at odds' with the United Kingdom's separation of powers, 95  is 'inconsistent with some fundamental substantive or procedural aspect of our law' 96 or if the court opts to defer on democratic grounds to the legislature's considered view as to the appropriate balance to be struck between individual rights and societal interests. 97 The internal impact of the Convention case law is also contingent on the domestic court's assessment of the relevance and qualities of the Strasbourg Court's decision-making. The age of a Strasbourg authority may affect its potential domestic influence. 98 So too may the absence of a 'clear and consistent' position on the part of the Strasbourg Court. Increasingly, perceived deficiencies in the reasoning of the Strasbourg Court may also reduce the applicability of the relevant case law; UK Supreme Court authorities highlight that incoherence or confusion 99 and a lack of justificatory reasoning 100 will also diminish the likelihood of straightforward application of Strasbourg decisions in the domestic context. What is clear is that the section 2(1) duty is 'context specific' 101 and that the applicability of the Strasbourg case law is displaceable presumption rather than overriding imperative.
An approach to the domestic application of the Convention rights which straddles internationalism and municipality has therefore emergedat least since 2009 102as the constitutionally preferable approach to the Human Rights Act's migratory mandate. This approach ought to be differentiated from the approaches outlined above. Critical engagement with questions of domestic integration and with the qualities of the Strasbourg case law operates as a process of filtering which serves to reduce the potential for unquestioning adoption of the jurisprudential requirements of the Strasbourg authorities. The liminal approach differs from the municipality approach in that it does not necessarily view the rights protected via the Act and those emanating from the Convention as being conceptually distinct. As a result, rights protection under the Human Rights Act is in practice best understood as an amalgam of the domestic and international, of the Convention rights and of municipal law. On this approach, the constitutional migration precipitated by the Human Rights Act is fluid, being contingentamong other thingson the context of the domestic dispute and on the court's assessment of the applicability of the available Strasbourg case law.
Even in the light of this, however, the difficulty faced under the Human Rights Act regime is that the extent to which domestic rights can shift away from their Strasbourg counterparts is somewhat limited. Domestic courts may, for instance, enjoy limited room for (variable and context-specific 103 ) manoeuvre in those circumstances in which national authorities might enjoy a margin of appreciation. 104 Similarly, if the European Court of Human Right has not confronted the specific issue before the domestic court, the court 'can and should aim to anticipate, where possible, how the European Court might be expected to decide the case, on the basis of the principles established by its case law'. 105 But as a general principle, 'alignment between interpretation [of the Convention rights] at the international and domestic levels' 106 is regarded as being a clear objective.

T        
It is perhaps unsurprising that the Human Rights Act provoked (initially at least) such a strongly internationalist response from the courts; it is an explicitly internationalising measure. Among comparable instruments, the Human Rights Act compares favourably with the most strongly internationalist Bills of Rights, 107 explicitly using identified treaty rightsreinforced by mandatory consideration of the Strasbourg jurisprudenceas its substantive sub-structure. It is similarly unsurprising that patterns of internationalisation visible in other constitutions (especially perhaps those in which the influence of international norms has had a significant or transformative effect) have similarly prompted 'pressures to shift from broadly internationalist constitutional practice toward more parochial policy'. 108 The umbilical linkage between the Human Rights Act and the jurisprudence of the European Court of Human Rights is therefore simultaneously the Act's core strength and its keypotentially fatalweakness. It is the jurisprudence of the Strasbourg court that provides the Human Rights Act with much of its normative backbone. Yet the centrality of the European Court's jurisprudence to the Human Rights Act scheme also feeds those sovereignty-based critiques of the Act which suggest that decisions of the European Court are permitted excessive influence in the domestic constitutional order. Though the internationalising narrative of the Act's migratory effects isas we have seenbut one of a range of responses