The prime minister is facing a donors’ revolt and growing pressure to leave Downing Street as soon as the outline of a trade deal is negotiated with the European Union this autumn.

Discontent with Theresa May among the Conservatives’ financial backers boiled over at a fundraising event last Thursday, according to a donor. An account of the event — where about a quarter of the 50 donors present were said to have demanded her resignation — has been circulating among Brexit-supporting Tory MPs.