The actions of Irish nationalists in Britain are often characterised as a 'sideshow' to the revolutionary events in Ireland between 1912 and 1922. This original study argues, conversely, that Irish nationalism in Britain was integral to contemporary Irish and British assessments of the Irish Revolution between the Third Home Rule Bill and the Anglo-Irish Treaty. Darragh Gannon charts the development of Irish nationalism across the Irish Sea over the course of a historic decade in United Kingdom history – from constitutional crisis, to war, and revolution. The book documents successive Home Rule and IRA campaigns in Britain coordinated by John Redmond and Michael Collins respectively and examines the mobilisation of Irish migrant communities in British cities in response to major political crises, from the Ulster crisis to the First World War. Finally, Conflict, Diaspora, and Empire assesses the impacts of Irish nationalism in metropolitan Britain, from Whitehall to Westminster. The Irish Revolution, this study concludes, was defined by political conflicts, and cultures, across the Irish Sea.

Honorable Mention, 2024 Donald Murphy Prize, American Conference for Irish Studies

Winner, 2025 Irish Historical Research Prize (Special Recognition Prize), National University of Ireland

‘An essential addition to the history of Irish nationalism. Moving between Dublin and British cities like London, Liverpool, Manchester and Glasgow, this book tells the fascinating story of how the Irish diaspora balanced their commitment to freedom for Ireland with the realities of living at the heart of the British Empire.’

Roisin Healy - University of Galway

‘This is an important book which transforms our understanding of the Irish diaspora in Britain and its politics across the crucial period 1912–1922. Combining the methods and arguments of new political history with a thorough archival reconstruction of Irish nationalist politics, Conflict, Diaspora and Empire deserves to be widely read.’

Jon Lawrence - University of Exeter

‘A striking work of new political history, this study illuminates the politics of Irish diasporic nationalism during a pivotal era. In rich archival detail, it traces the evolution from constitutional to militant nationalism and offers new ways of thinking about minority politics in twentieth-century Britain.’

Mo Moulton - University of Birmingham

'The level of detail presented on the various currents of Irish nationalism in Britain makes for a fascinating read. Gannon has done the Irish in Britain a great service in identifying the very full contribution of those Irish nationalists living in Britain who played a significant part in the fight for Irish freedom during the revolutionary period. He brilliantly brings alive the battle for the hearts and minds of those Irish living in Britain from pro-Union and pro-Irish independence sides but also different sides within the Independence movement.'

Kevin Rooney Source: Irish Border Poll

‘… A pioneering new study of the era’s evolving politics.’

Dermot Bolger Source: Sunday Business Post

‘… Darragh Gannon has mined a wealth of published and archival material to produce a compelling history of Irish nationalism in Britain through the phases of that hectic decade of war and revolution …’

Dan Mulhall Source: Irish Post

‘… a groundbreaking study of how Ireland won freedom.’

Martin Mansergh Source: Sunday Independent

‘a persuasive book … (it) deserves to be widely read.'

David McCullagh Source: RTE

‘confident and original … this book fills a significant hole in the history of the revolutionary decade.'

Diarmaid Ferriter Source: The Irish Times

‘Darragh Gannon has written a persuasive book, which strongly suggests that accounts of the revolutionary decade which treat events in Britain as marginal, are actually looking through the wrong end of the telescope; the successes and failures of Irish nationalists in Britain had an important impact on events between 1912 and 1922. This book deserves to be widely read…’

Source: RTE

‘A truly laudable book. In his steadfast refusal to portray either ‘the’ British or ‘the’ Irish as static categories, and in his forensic analysis of the parliamentary and extra-parliamentary efforts of the Irish in Britain to aid their kin in Ireland to attain self-government - in whatever form - Darragh Gannon has written what is sure to be essential reading for students of the IrishRevolution.’

Timothy G. McMahon Source: Irish Literary Supplement

‘A fascinating and well-researched book on a major topic.’

Richard English Source: Irish Political Studies

‘… meticulously researched … well-written … with imaginative expressions throughout.’

Scott Denis Mccarthy Source: Australasian Journal of Irish Studies

‘The role of women in republican and nationalist movements, and gender identities are effectively explored … this is an important contribution to transnational histories of Irish nationalism that convincingly highlights the significance of the Irish in Britain in the establishment of the Irish Free State.’

Niamh Coffey Source: Journal of British Studies

‘The choice of date span is crucial to the success of the book as it covers both constitutional and revolutionary nationalism and straddles the First World War … this new book cements his reputation as an authority on the significance of Irish revolutionary movements and their impact outside Ireland.’

Marie Coleman Source: Irish Historical Studies