12月，梅输掉了第一场重要的退欧战役，工党议员联合12位保守党叛徒通过了一份修正案，要求一切与欧盟谈成的协议都需要国会法案批准。
In December, May lost her first important Brexit battle, when Labour MPs united with 12 Tory rebels to pass an amendment requiring a specific Act of Parliament to approve whatever deal is negotiated with the EU.