British Prime Minister Boris Johnson, who was heavily criticized in the "Partygate" affair, has to face a vote of no confidence from his Conservative Party on Monday evening.

The head of the responsible party committee, Graham Brady, announced on Monday in London that the necessary number of corresponding applications from Tory MPs had been reached.

According to information from London, 54 corresponding letters were received by the committee, which corresponds to 15 percent of the 359 Conservative MPs in the House of Commons.

Should Johnson achieve 50 percent or more in the vote, i.e. at least 180 votes, he can remain chairman of the party and thus remain prime minister.

Johnson has been under a lot of pressure since the "Partygate" scandal surrounding lockdown celebrations.

He was loudly booed on Friday when he arrived at the Thanksgiving Mass for Queen Elizabeth's 70-year reign in London.

A survey commissioned by the newspaper "Sunday Times" also predicts that Johnson's Conservative Party will suffer a severe defeat in an upcoming by-election for a parliamentary mandate.

By-elections are scheduled for June 23 in two constituencies previously held by the Conservatives.

In both cases, the incumbent had to resign because of scandals.

Johnson declined to resign, citing the difficult economic situation, Russia's war against Ukraine and his "huge projects for which I was elected".

The Prime Minister also does not believe that being fined by London police for attending a lockdown event constitutes a breach of government ethics rules.