This book examines the challenges of Brexit for the legal and political landscape in the UK and in Ireland and for the relationship between the two countries. It will appeal to anyone wishing to inform themselves more deeply about the political and constitutional pressures exerted by Brexit. 'This is a timely and valuable collection of essays that explores the challenges posed by Brexit for Ireland and the UK. These challenges played a significant part in the negotiation of the Withdrawal Agreement, and were centre stage in subsequent trade discourse. The book will be of interest to all those concerned by the impact of Brexit on constitutional ordering broadly conceived.' Paul Craig, Emeritus Professor of English Law, University of Oxford