This article examines British preferences on European monetary integration. It challenges dominant theories of preference formation, suggesting an alternative explanation focusing on governmental majority. Empirical evidence is presented on both UK economic behaviour and the views of domestic economic interests, as well as government majority. The article also analyses first and second-hand accounts of the main players involved in three cases: the decision not to join the Exchange Rate Mechanism in 1979, the decision to join the ERM in 1990, and the decision to opt out of stage 3 of Economic and Monetary Union.