Rishi Sunak must “show leadership” and support the privileges committee’s report into Boris Johnson, Sir Keir Starmer has said.

MPs are set to debate and vote on the findings of the committee, which would have seen the former prime minister face a 90-day ban from the House of Commons for “repeated contempts” of Parliament, on Monday evening.

It was widely reported overnight that Mr Sunak may join other ministers in missing the vote as he welcomes his Swedish counterpart to Downing Street.

Speaking in Edinburgh ahead of a speech setting out Labour’s green agenda, Sir Keir told BBC Breakfast: “I want to see the Prime Minister there when I arrive back in Parliament because he has to show leadership.

“What his predecessor got up to was unacceptable. If the Prime Minister wants to lead he has to come in and vote in this debate this afternoon to show where he stands on this issue.”

In an interview with Good Morning Britain, Mr Sunak declined to say whether he would be there for the vote and insisted he did not want to “influence” Tory colleagues, adding: “It will be up to each and every individual MP to make a decision of what they want to do when the time comes.”