Keir Starmer's crisis escalated today as Angela Rayner put herself at the head of a Labour revolt on the Mandelson 'cover-up'. A vote is taking place in the Commons demanding that information relating to the vetting of Mandelson is released. Starmer originally wanted to exclude compromising details about national security. The former deputy PM is among MPs demanding that Parliament's Intelligence and Security Committee (ISC) decides what material is released about the vetting process before Mandelson was appointed US ambassador. Frantic negotiations are now going on in the Commons between ministers and backbenchers to avert a huge defeat on a Tory motion that could demolish Sir Keir's remaining authority. #keirstarmer #petermandelson #angelarayner #labour #conservatives