MPs are expected to raise questions in the Commons on Tuesday about the ongoing turmoil at the BBC after Donald Trump threatened to sue for defamation and demand $1bn in damages over how Panorama edited one of his speeches.

The government has said it does not believe the BBC is institutionally biased but the Tories and Reform UK have been far more critical.

A day after director general Tim Davie and News CEO Deborah Turness resigned, the BBC's chairman Samir Shah rejected claims of systemic bias and dismissed allegations that board members were behind a politically motivated coup.

Liberal Democrat leader Ed Davey has called for Sir Robbie Gibb, a former Conservative communications chief who was appointed to the board by Boris Johnson, to be removed before the search for Davie's successor begins.

It is not yet known whether an urgent question will be tabled in the Commons, bringing Culture Secretary Lisa Nandy to the dispatch box to answer questions on the matter, but MPs are expected to argue over accusations of bias and how the corporation should respond to the latest crisis.

In June, the corporation faced similar scrutiny in Parliament after the broadcast of Bob Vylan's controversial Glastonbury set, during which the punk duo led a chant of "death, death to the IDF [Israel Defence Forces]".

And in February, Nandy responded to an urgent question about a documentary on Gaza that was narrated by the son of a Hamas official.

The latest furore came after a leaked internal BBC memo said Panorama had misled viewers by splicing two parts of the US president's 6 January 2021 speech together, making it appear as though he was explicitly urging people to attack the US Capitol after his election defeat.

The memo also accuses the BBC of issues within its Gaza coverage, anti-Trump and anti-Israel bias and one-sided transgender reporting - among other "troubling matters".

Lawyers acting for Trump have given the BBC until Friday to respond to his legal threat.

The BBC has said it will reply "in due course" to Trump's demand for a "full and fair retraction" of the documentary - which has sparked a major row about impartiality at the corporation.

Turness insisted the corporation was not "institutionally biased" on Monday, after her resignation alongside the director general.

Shah accepted an "error of judgement" had been made on the documentary and that the edited speech gave the impression of a "direct call for action" - and said the BBC would like to apologise for it.

The departures of Turness and Davie have sparked accusations of a politically motivated coup at the BBC.

Sir Robbie Gibb, a former senior editor at the BBC who was director of communications for Theresa May in Downing Street, has faced calls to be removed from the BBC board.

Writing in the Guardian, Liberal Democrat leader Sir Ed Davey said "rightwing populists have been attacking the BBC for years".

To ensure the BBC's independence and impartiality, Sir Robbie should have no role in appointing the new director general, he wrote.

"The government should remove him from the board immediately - and end the practice of political appointments, which so badly undermines the BBC, altogether," he said.

Sir Robbie has not responded.

The Conservative leader Kemi Badenoch said the focus should be on the mistakes made "rather than chasing people because of their political opinions".

Former Conservative MP Sir Jacob Rees-Mogg told BBC Two's Newsnight that the government should stay out of the latest controversy "because the BBC wants to maintain its independence from the government".

Asked about the US president's threat of legal action, he said: "I would have thought it would be sensible for the BBC to settle with Donald Trump... It won't be a billion, it will be some lesser amount."

Reform UK leader Nigel Farage, who claimed the BBC "has been institutionally biased for decades", said he spoke with Trump on Friday, telling a London news conference: "He just said to me: 'Is this how you treat your best ally?'".