Below we take a look at all the Tories who have questioned the PM's leadership or called for him to resign.

So far only a handful of Tories have publicly called for Mr Johnson to resign after he admitted to attending a party in the garden of No 10 during the first Covid lockdown.

George Freeman, Science Minister The MP for Mid-Norfolk denied he was calling the PM's leadership into question in a letter sent to his constituents in which he allegedly said people in positions of power "shouldn ’ t seek to escape public responsibility or accountability", according to The Times.

But in a Tweet on Monday night, Mr Freeman recanted his criticism.

but many more mps are understood to be doubting their leader and are waiting to come forward until ms gray's report is published.

But the right one."

"If not, then I know what I need to do without any more advice, thank you very much."

Steve Baker, a longtime thorn in the side of Conservative governments who helped bring down May, refused to say whether he had submitted a no confidence letter but said : "People are very upset and angry."

"He's damaging us, and the entire Conservative brand with an unwillingness to accept the strictures that others have lived by.

He told BBC Radio 4's PM programme that it was "a tragedy things have come to pass in this way", adding : “ Unfortunately, I wasn ’ t reassured.

Baroness Ruth Davidson The former leader of the Scottish Conservative Party, who was elevated to the Lords last year, has made clear she thinks Mr Johnson should resign and stood behind her successor's.

what tf were any of these people thinking ?"

Once that is trashed by those in power the very essence of our democracy is at stake."

Currently only Sir Graham knows how many letters have been triggered and whether the threshold is close to being reached.

He is also expected to sack a number of No 10 staffers.

While Downing Street insiders have reportedly devised a plan to sack officials and save Johnson, referred to as "Operation Save Big Dog", some Tory MPs are stepping up pressure on colleagues to submit letters of no confidence in the prime minister.

Two MPs elected in 2019 said they knew of about a dozen colleagues in the same intake who had put letters in.

"It only takes a dozen letters from each group to get you close to the 54 you need [ to trigger a no confidence vote in the prime minister ], so it's harder to keep them all down at once," the source said.

He said MPs were "mostly waiting for Sue Gray's report" before deciding Johnson ’ s fate, referring to the investigation by the senior civil servant into the multiple alleged breaches of Covid rules inside Downing Street and Whitehall over the past 18 months.

But asked whether Johnson would lead the Conservatives into the next election, Baker said : "In a situation as volatile as this, I think it's impossible to say and I regret that very much.

I would still prefer that Boris Johnson were a roaring success.

Other MPs said their inbox was "off the scale" with complaints about Johnson, particularly from local Conservatives who hoped he would be replaced before local elections on 5 May.

Dignity-wise, I see the Johnson administration has moved to the stage of a man in a dirty tracksuit saying he 'll do a polygraph.

Dominic Cummings ’ insistence that the prime minister is lying, and that he ’ ll swear to it, makes you wonder if Sue Gray is really the person to run the inquiry into Downing Street parties.

In the meantime, I am enjoying the dead look in all the ministers' eyes as they are seconded to defend Johnson in the face of what might soon become the indefensible.

For more than 10 years, Conservative governments wishing to kneecap the BBC have fallen back on one question they always believe is rhetorical : why does this or that presenter get paid more than the prime minister?

In a word : NO.

Namely, it ’ s all desperately negative.

Strip away Johnson ’ s famous boosterism, and you are left with a series of hit jobs on things.

All very well for a newspaper columnist – indeed, it is the stock in trade – but he is the prime minister.

The policies that will actually be his legacy are sunderings and squanderings and underminings, in whose ruins he has failed to make something new and positive.

It would be an epic sleight of hand – but then, those are really all he ’ s ever had.

William Hague once said that the Conservative Party is "an absolute monarchy tempered by regicide".

Whilst Boris Johnson's No 10 and its garden are a step down from Versailles and the Winter Palace, the goings on inside bear comparison with the last days of the Bourbons and the Romanovs.

The public suffered, while inside the palace gates the monarch engaged in bacchanalian frolics fuelled by the best wines from Chateaux Co-op.

Wheeled to the guillotine, he will have spent barely two years in charge.

Despite the onslaught, many Tory MPs are temporising, waiting for the report of a senior official, Sue Gray, to provide a definitive ruling on the social events which took place during lockdown.

But she is unlikely to compromise her position as a civil servant by doing more than setting out facts.

Nonetheless, the potential regicides have problems of their own.

Many of them voted for Johnson as leader, knowing full well that he was a consistent rule-breaker and pathologically dishonest.

many new mps and their constituents are comfortable with johnson's big-state conservatism.

Theresa May lasted three years; Johnson is likely to go after two and a half.

Before anyone gets to find out, Tory MPs have to stop griping and start writing letters to get rid of Johnson.

These days, MPs must calculate whether they should be one of the 54 to submit letters to the chairman of the 1922 Committee, with no guarantee that they will reach the threshold or win the subsequent vote of "no confidence".

There are former supporters of Theresa May, embittered ex-ministers, closet Remainers, militant Brexiters, Thatcherites, secessionist Scots, levelling-uppers and those from the home counties who privately think that more than enough is being done for the proletarian north.

His hangers on like Priti Patel, Jacob Rees-Mogg and Nadine Dorries would be out of a job in any other administration.

Assuming that Johnson can be disposed of, this disparate group of MPs has the key role of choosing a shortlist of two for the party members to choose from.

For the opposition, all of this looks like a good opportunity to bring Tory dominance to an end.

this week in politics looks like an eternity.

Yet the longer term prospects are more murky.

A new Tory leader will get an electoral bounce and the Labour lead will evaporate like snow in the spring sunshine.

A key selling point of both Starmer and Davey is that, relative to Johnson, they are sensible and responsible.

Vince Cable is a former business secretary and leader of the Liberal Democrats.

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