Volume II of The Official History of the UK Strategic Nuclear Deterrent provides an authoritative and in-depth examination of the British Government's strategy towards nuclear deterrent from 1964 to 1970. Written with full access to the UK documentary record, Volume II examines the nuclear policy of the Labour Government that took office in October 1964. Having decided to preserve the Polaris programme, ministers were nevertheless committed not to develop another generation of nuclear weapons beyond those in the pipeline, placing major questions over the long-term future of the nuclear programme and collaboration with the United States. This book will be of much interest to students of British politics, nuclear proliferation and international relations.