This work represents a documentary sourcebook on British economic development during the postwar years. The author provides a balanced overview of contentious themes relating to the context, dimensions, pace and consequences of Britain's relative economic decline since 1945. In a broad introduction, the author discusses the problems faced by economic historians when using and interpreting documentary sources, providing guidance on the main themes in the volume and the wider literature. The documentary extracts deal with aggregate economic performance, industrial development, the balance of payments, the labour market and the main historiological themes. Commentaries accompany the sources, providing full explanations of the technical terms and statistical information. The work is designed to be acessible to those with no formal economic background, and is intended for those studying and teaching economic history, modern history, economic policy and British politics.