Theresa May has 10 days to save her premiership after she was put on notice to shape up and show she is fit to lead.
Confidence in the prime minister is in free fall in Tory ranks as constituency party bosses told ministers and MPs to force her from power. Up to a dozen MPs are ready to demand a vote of no confidence in May by submitting letters to the backbench 1922 committee.
Their ranks are expected to swell this weekend as MPs consult grassroots grandees about Mays faltering response to the Grenfell Tower inferno in west London.
Cabinet ministers have also let it be known they will oust the prime minister if it looks as if she is in danger of losing the vote on June 28 on Wednesdays Queens speech.
Mays faltering response was thrown into sharp contrast by the Queen, who used an unprecedented birthday message yesterday to try to boost public morale.
Reflecting on Britains succession of terrible tragedies she said: It is difficult to escape a very sombre national mood. Royal sources said the Queen had urged senior royals to give support to those affected wherever it was needed.
At trooping the colour yesterday the Queen observed a minutes silence. A further one minutes silence will be held on Monday at 11am to commemorate the dead, feared to be at least 58.
MPs warned there had been a collective collapse of trust in Mays leadership, and a cabinet minister told friends he was worried about her state of mind. Another minister close to May said: She had better stop feeling sorry for herself, pull up her socks and start to lead and if she cant do that she should go. Shape up or ship out.
Tory sources said there was a mood to do an IDS on May, meaning to force a vote of no confidence to oust her, as happened to Iain Duncan Smith in 2003; 48 MPs would need to demand a vote.
One senior backbencher said he was under pressure to join in: Ive got serious members in my constituency texting me saying: Youve got to get rid of her quickly because every time she appears shes making the party more toxic.
Heidi Allen, the MP for South Cambridgeshire, issued a coded call for May to change or go. She said the public wanted a leader and a party that will carry us through this most turbulent of periods but care about the little man . . . We have to change, and if we dont we deserve to die.
A former minister added: Shes going to have to go sooner rather than later. The critical moment is June 28 and 29, when there are votes on the Queens speech. If it looks like they will be lost, you have to strike.
Allies of Boris Johnson and David Davis accused each other of going on manoeuvres. Leading remain backers also plan to have a candidate in place by next week, expected to be the home secretary, Amber Rudd. Last night Eurosceptics warned May they would challenge her if she attempted to water down her Brexit plans.
Writing in The Sunday Times today, David Jones the Brexit minister sacked last week says backtracking would rightly be seen as a betrayal of trust and mean all parties would reap the whirlwind of public anger. However, as we report in Business, the CBI and other leading business groups have written to the government pressing for a softer Brexit.
Mays deputy Damian Green called the criticism of her terribly unfair. He said: Shes distraught by what happened.