Wes Streeting is poised to pull the pin on the Labour leadership grenade today as Keir Starmer begs MPs not to 'sink into the politics of division'.

The PM delivered the stark message alongside the King's Speech - with questions raging over whether he will stay in No10 long enough to implement the legislative programme.

The Health Secretary is said to have told allies that he is ready to pull the trigger on a leadership challenge as soon as tomorrow, after a brutal 16-minute meeting with Sir Keir in No10 this morning. 

A senior Government source told the Daily Mail: 'Yes, it's happening. Wes is definitely going for it.' 

Another Labour aide said: 'I don't see how they can not after all this briefing.' 

Mr Streeting was notably absent from the frontbench in the Commons as MPs waited for the monarch to arrive, with Sir Keir flanked by Home Secretary Shabana Mahmood and Rachel Reeves. He later appeared standing by the Speaker's chair, and filed through to the Lords to watch the Speech next to Tory James Cleverly.

Allies had committed to staying silence today to avoid embarrassing the King, but his intentions leaked out shortly after the abortive talks with Sir Keir.  

The package of 35 Bills - and several draft Bills - includes moves to cosy up to the EU, as well as boost the push for Net Zero.

However, there is no fresh attempt slated to curb benefits spending - after mutinous MPs crashed the last one. 

There is also only a passing mention of 'sustained' defence spending increases, with no timetable for publishing the long-awaited investment plan. 

And questions have been raised over the lack of references to Home Secretary Shabana Mahmood's settlement rights overhaul - which has infuriated many of Sir Keir's critics.

Among the measures in the Speech today:

• An EU Partnership Bill would give ministers sweeping powers to adopt Brussels rules without the Commons voting; 
• A Peerages Removal Bill could see Peter Mandelson targeted to have his title formally taken away; 
• The Government has again committed to a 'conversion practices' Bill, but only a draft rather than full legislation;
• Net Zero measures feature heavily in a win for Ed Miliband - seen as a key powerbroker in the Labour leadership struggle.   

The premier has come under fire for putting the King in a difficult position, having to conduct the State Opening amid a full-blown Labour civil war.

The Speech was scheduled for today seemingly as a 'firebreak' following local elections, but the tactic has failed to subdue fury at the drubbing.  

Sir Keir had a showdown with Mr Streeting, widely believed to be behind the insurrection, in Downing Street this morning. But the Health Secretary exited grim-faced after just 16 minutes, having seemingly found no common ground.

The PM faces a torrid time in the House later, when his first clashes with Kemi Badenoch since disastrous local elections will test the mood of the Labour benches.   

In his introduction to the Speech package, Sir Keir played up the global 'volatility' with the Iran and Ukraine wars causing chaos.

The PM - who has warned that his ousting would fuel the turmoil on markets - promised to 'continue our work to stabilise the economy and support people with the cost of living'.

Apparently delivering a message to his own restive MPs, Sir Keir said: 'At moments like these, we face a choice. 

'We can choose to sink into the politics of grievance and division. Or we can choose to see it as an opportunity to deliver on the change we promised the British people.' 

He said the Government would end defence 'austerity' and 'stand strong with Nato', despite tensions with Donald Trump. But Sir Keir only said ministers will 'push ahead' with the Defence Investment Plan, without revealing when. 

He said there was now 'greater urgency' for change, including 'setting a new direction for Britain at the next EU summit'. 'Putting Britain at the heart of Europe,' he added. 

A grim-faced Mr Streeting was in Downing Street for barely 16 minutes this morning. 

The brevity of the encounter will spark speculation that there was no meeting of minds over Mr Streeting's coup attempt. 

The PM's band of allies had dismissed the discussion as a 'quick cup of coffee' beforehand, jibing that Mr Streeting does not have the numbers or the 'nerve' to challenge.

The party's union paymasters waded into the row this morning, releasing a joint statement calling for a more Left-wing agenda. 

'It's clear that the Prime Minister will not lead Labour into the next election, and at some stage a plan will have to be put in place for the election of a new leader,' the affiliated unions said. 

Ominously for Sir Keir, the next batch of Mandelson documents is due to be released as early as next week. 

Manchester mayor Andy Burnham and Angela Rayner are both circling as the question of who will succeed Sir Keir dominates MPs' discussions. 

High drama at Westminster yesterday saw four Labour ministers resign, saying they no longer had confidence in the premier. 

The number of Labour MPs calling for him to go rose to 90, and Home Secretary Shabana Mahmood was forced to deny she is on the brink of quitting after telling the PM to set out a timetable for his departure.