Keir Starmer told LBC that even if Boris Johnson wins the confidence vote, it will mark the beginning of the end for him. 
Sir Graham Brady, the chair of the backbench 1922 Committee, has announced that the number of Conservative MPs to have submitted letters of no confidence in Boris Johnson has reached the threshold of 54, triggering a vote on the prime minister’s leadership. 
Boris Johnson needs at least 180 votes to be sure of winning. Theresa May was the last Conservative prime minister to win a vote of confidence in 2018 but was out of office less than eight months later