2019 saw the Labour Party meet its fourth consecutive general election defeat, and its worst since 1935.Arguing that it is vital for Labour to regroup if it is to offer a serious alternative government, Lord Ashcroft draws on extensive research among real voters – especially those who have moved away from Labour in former heartland seats now represented in Parliament by the Tories.Diagnosis of Defeat explores the reasons for this extraordinary result and offers a frank and uncompromising portrait of the Labour Party as it is seen today.