The passing of the Statute of Westminster, 1931, marked the end of a chapter in inter-Imperial constitutional relations. It was considered by most that, while old conventions must develop and new ones come into being, the legal problems of the Commonwealth had, as far as the Dominions and the mother-country are concerned, been finally solved. The hope has been expressed that ‘the time will soon have passed when the problem of inter-Imperial relations can profitably be discussed as a matter of municipal law’. It is over five years since the passing of the Statute of Westminster and it may not be unprofitable to review briefly inter-Imperial legal constitutional history since the passing of the Statute and to consider how far in the light of it we are justified in regarding as solved the strictly legal problems of inter-Imperial relations.