Sir Keir Starmer has insisted that he isn’t going anywhere and will fight any attempts by his own party to oust him from No 10 after more than 80 Labour MPs called for him to stand down. But history is littered with prime ministers who have not been able to choose the time of their departure from office – from Margaret Thatcher to, more recently, Liz Truss. Here we look at how the Labour leader could be forced out of Downing Street – leaving the UK with its seventh prime minister in a decade. The Prime Minister’s position is uncertain (PA) (PA Wire) Senior ministers start to resign So far we have had resignations from ministerial bag carriers and one junior minister, but the PM will struggle to stand firm in the face of a challenge from one of the big beasts tipped to replace him. That could include health secretary Wes Streeting , who has so far has been reluctant to make the first move, aware that he would have to resign from the cabinet to do so.…