Sir Keir Starmer told allies he believes he can win a leadership contest as the Labour Party was plunged into a bitter civil war. It comes as the Prime Minister was on Wednesday due to hold crisis talks over his future with Health Secretary Wes Streeting, who is seen as a frontrunner in any future Labour leadership race. Warring factions traded blows as Starmer loyalists mounted a rearguard action against more than 100 MPs who have called on the…