Through a thorough exploration of British government records, this book explores the UK's nuclear, biological and chemical weapons programmes and attempts to control them between 1956 and 1975. It addresses issues concerning the military, economic and political pressures that influenced policy; the degree to which the UK was a reluctant or enthusiastic player on the international arms control stage; and the effect of international agreements on Britain's weapons programmes. In so doing, it provides the first attempt to assess Britain's NBC arms control policy and practice during the Cold War.