SCOTTISH Tory MSPs were last night behind a co-ordinated effort to force Boris Johnson to quit as Prime Minister putting pressure on Alister Jack to take a stand.

The Scottish Secretary was among a falling number of Conservative parliamentarians to remain silent on whether the Prime Minister should resign after ­admitting attending a drinks party in the ­Downing Street garden during the first lockdown.

All 30 other Tory MSPs have backed their leader Douglas Ross’s view that Johnson should go.

Murdo Fraser, Douglas Lumsden, Liz Smith, Craig Hoy, Jackson Carlaw, Stephen Kerr, Finlay Carson and former-leader-turned-Baroness Ruth Davidson all publicly commented in support of Ross’s demand.

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Johnson admitted he spent 25 minutes at the event on May 20, 2020 as he faced angry MPs and cross party calls to step down during a rowdy session of Prime Minister’s Questions yesterday.

At the time coronavirus ­restrictions in England meant that people were only allowed to meet one other ­person outside. Johnson apologised for attending the event but insisted the Number 10 garden was “an extension” of the office.

Shortly after PMQs, Ross, who is the MP for Moray, and also sits in Holyrood, called for Johnson to step down as Prime Minister.

The Scottish Tory leader said: “I said yesterday that if the Prime ­Minister attended this gathering or party or event at Downing Street on May 20, then he could not continue as Prime Minister.

“So, regretfully, I have to say that his position is no longer tenable.”

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Ross’s demand Johnson should ­resign was quickly backed by other Tory MSPs. Fraser wrote on Twitter: “I fully support [Ross] in this call. I’m afraid the Prime Minister’s ­position is no longer tenable, he has lost ­public trust, and in the interests of the ­country and the Conservative Party he should step down.”

Former party leader Carlaw said Ross had “made the right call and that the PM should stand down”.

Hoy tweeted: “It’s clear that the PM should now go. A line has been crossed. @Douglas4Moray has been clear, consistent – and he is correct.”

Lumsden wrote: “Fully support @Douglas4Moray with this call.

“Can’t have PM breaking rules when the rest of us were confined to zoom quizzes.”

Kerr wrote: “I support what my colleague @Douglas4Moray has said today. Elected members, in particular senior ones, must respect the rules they create.”

Smith wrote: “I note that the media believe @Douglas4Moray. Ross has made a brave call. He has also made the right call.”

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Carson tweeted: “Let me be clear for you ... I absolutely support @Douglas4Moray position, did yesterday and do today!”

Ross told STV: “ I don’t want to be in this position but I am in this ­position now where I don’t think he can continue as leader of the ­Conservatives.”

He added that he had spoken to the PM and also said he would write to the 1922 Committee to express no confidence in Johnson’s leadership.