Speaker of the House Lindsay Hoyle removed Your Party MP Sultana from the House after she would not withdraw the claim that Starmer is a “bare-faced liar”.

As she did not leave the chamber when he asked her to, Hoyle “named” her – a motion suspending her from participation in the proceedings. This means she is now suspended from the House for five days and will also lose pay as a result.

The last MPs to be “named” and suspended from the Commons were Alba Party MPs Neale Hanvey and Kenny MacAskill, who held a protest during Prime Minister’s Questions in favour of Scottish independence in July 2022.

Starmer had told MPs it was “staggering” that he was not told Mandelson had failed vetting checks and acknowledged Parliament should have known about it “a long time ago”.

The Prime Minister said Foreign Office officials had approved Mandelson’s developed vetting status, enabling him to see secret information as ambassador to the US, despite the recommendation of security experts not to grant clearance.

As MPs put questions to Starmer, Sultana said: “We all know that the Prime Minister appointed Mandelson because he owes his job to him. He appointed him, he defended him, and now he claims to know nothing.

“He is gaslighting the nation. So let’s call this out for what it is. The Prime Minister is a bare-faced liar.”

Hoyle said: “Leave now, I’ll name you otherwise, I’d go now if I were you.

“I’ve given the option to name. I’d leave if I were you, very quickly.”

Sultana attempted to interject and said: “I have a duty to the House to tell the truth.”

Hoyle held a vote, brought by government whip Gen Kitchen, which said: “I beg to move that Zarah Sultana be suspended from the services of the House.”

MPs voted in favour.

“Leave, I’m sorry you’ve done this, I really am,” Hoyle said.

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It comes after Reform UK MP Lee Anderson was also sent out for accusing the Prime Minister of lying and refusing to withdraw it.

Anderson, the MP for Ashfield, said: “The problem the Prime Minister’s got is no-one believes him. The public don’t believe him. The MPs on this side of the House don’t believe him. His own gullible backbenchers don’t believe him.

“So does the Prime Minister agree with me, he’s been lying?”

Hoyle intervened to say: “Sorry, we don’t use those words, and I’m sure the member’s withdrawn it.”

Anderson replied: “Mr Speaker, I have the greatest respect for you and your office, but I will not withdraw it. That man couldn’t lie straight in bed.”

Hoyle said: “Mr Anderson, you’ll have to leave.”

Later, Starmer denied misleading the House of Commons.

Scottish Tory MP John Lamont said: “The Prime Minister said various things over the course of the last few weeks and months, which have now turned out not to be true around the vetting process of Peter Mandelson.

“Does the Prime Minister accept that he inadvertently misled the House of Commons?”

Starmer replied: “No, I did not mislead the House of Commons. I accept that information that I should have had, and information that the House should have had, should have been before the House, but I did not mislead the House, and that’s why I’ve set out the account in full.”