4 hours ago Chris Mason, Political editor and Iain Watson, Political correspondent Getty Images Surveying the scale of Labour's disastrous elections performance, the number of Labour MPs saying publicly that Sir Keir Starmer should resign or attach a sell-by date to his premiership had passed 20 by late Friday evening. Let's see if that is a position that becomes contagious. There are no shortage of Labour MPs who say it is the prime minister himself who was toxic to many voters. "There was one issue on the door and it was Keir. If he leads us into a future election we are dead," one Labour MP told the BBC. Another usually loyal Labour MP, in an area that went heavily Reform in Thursday's poll, told us that the reassuring thing was that voters didn't really hate Labour, but "they did hate Keir". A senior Labour figure said to me "everyone in Wales is saying this is all Starmer's fault".…