At a glance: Starmer grapples with leadership crisis
Sir Keir Starmer is fighting to stay on as prime minister, as he stares down calls from Labour critics, including some of his own ministers, to quit Downing Street.
It comes amid a revolt among Labour MPs and calls from ministers for him to draw up an exit timetable after a disastrous set of elections last week.
Here is a summary of what is happening.
What's happening today?
Home Secretary Shabana Mahmood is among a number of cabinet ministers urging the prime minister to set out a departure timetable
But at his weekly cabinet meeting earlier, Sir Keir said he does not intend to quit and threw down the gauntlet to potential rivals to formally challenge him as Labour leader
No MP has yet launched a formal bid to challenge Sir Keir - a move requiring the backing of 81 colleagues, or 20% of Labour MPs, according to party rules
After the meeting, key allies including Housing Secretary Steve Reed and Work and Pensions Secretary Pat McFadden told journalists they were continuing to back Sir Keir
But Health Secretary Wes Streeting, seen as a likely leadership rival, made no comment to reporters as he left Downing Street
Foreign Office Minister Jenny Chapman, another Starmer ally, acknowledged a "discussion is taking place" over his leadership, but told reporters no minister challenged him at the cabinet table
What's the mood in the party?
Nearly 80 Labour MPs have publicly urged Sir Keir to resign immediately or draw up an exit timetable
Two ministers - Jess Phillips and Miatta Fahnbulleh - have resigned from the government
Along with Streeting, former deputy PM Angela Rayner is seen as the most likely challenger to Sir Keir among Labour MPs
Greater Manchester Mayor Andy Burnham also has support - but would need to become an MP to stand for leader, requiring a more drawn-out contest
How did we get here?
The prime minister gave a hastily-convened speech on Monday in a bid to shore up his position
But the move seems to have backfired, with the number of Labour MPs calling on him to go rising steadily in the hours afterwards
The revolt among MPs follows a disastrous set of elections for Labour last week, where it lost almost 1,500 councillors in local elections across England
It was also kicked out of power in Wales and slumped to its worst ever result at a Scottish Parliament election
The elections had been billed as a key test for Sir Keir's leadership amid dire poll ratings and the row over his decision to appoint Peter Mandelson as US ambassador, which has led some MPs to question his judgement.
