This book provides the first evaluation of the three Conservative administrations which have been affected, shaped and largely determined by the age of Brexit.It breaks new ground by collectively analysing the Cameron, May and Johnson administrations in an era of political and social shock and disruption, caused by the phenomenon of Brexit. As an edited collection, the project brings experts together who explain the complexities of ideas, leadership, votes, policy areas and territorial politics in an accessible and concise fashion. As a collection of essays, the project does not prosecute a single thesis, bar the fact that the phenomenon of Brexit has affected, shaped and largely determined the politics of these Conservative administrations and wider UK society. There is broad coverage of leadership, elections, public policy and territorial questions and contributors consider the continuities and discontinuities in Conservative Party ideas and political action in their respectivepolicy areas.