In the mid-1980’s, then-Prime Minister Margaret Thatcher successfully pushed the idea of an integrated internal market. The liberalization of trade and investment implied by the Single European Act was greatly inspired by a British deregulatory vision.
事实上，英国上一次为欧洲大声疾呼是在二十年前。20世纪80年代中期，时任首相撒切尔夫人成功地推广了一体化内部市场的思想。单一欧洲法案所隐含的贸易和投资自由化极大地受英国去监管化观念的启发。当是时，德洛尔提出引入单一货币作为补充和完善单一市场的办法。