More than 70 MPs have now signed a motion expressing no confidence in the Speaker after angry scenes in the Commons on Wednesday.
Senior Conservatives and Scottish National Party MPs have put their names to the “early day motion” proposed by senior Tory William Wragg in a move intended to pressure the Speaker, Sir Lindsay Hoyle, to step down.
On Friday afternoon, the total number of signatures stood at 71, including Sir Graham Brady, chairman of the 1922 Committee of Conservative backbenchers, former Tory deputy chairmen Lee Anderson and Brendan Clarke-Smith, the SNP’s Westminster leader Stephen Flynn and his deputy Mhairi Black.
More than half of the SNP’s Westminster contingent have signed the motion, reflecting anger in the party at the Speaker’s handling of its opposition day motion on Wednesday, while 40 Conservatives and one Independent, former Tory Rob Roberts, have joined them.
Environmental Audit Committee chairman Philip Dunne appeared to have signed the motion but then withdrew his signature shortly afterwards.
The total means that more than 10% of the Commons has backed the call for Sir Lindsay to step down, but the momentum behind Mr Wragg’s motion appears to have slowed with only four names being added to the list on Friday.
They were Conservatives Mark Eastwood and Ben Spencer, and the SNP’s Hannah Bardell and Marion Fellows.
As an early day motion, it is very unlikely to be debated on the floor of the Commons, but a large number of signatures could signify that the Speaker has lost the confidence of the House and persuade him to step down.
There does not appear to be a formal mechanism for removing a Speaker, with previous holders of the office only being replaced on their resignation or death, but it would be difficult for him to carry on if a significant number of MPs called for him to go or he lost a confidence vote in the Commons.
In 2009, Speaker Michael Martin was effectively forced to resign over his handling of the MPs’ expenses scandal, the first Speaker to be forced out in more than 300 years.
On that occasion, only 23 MPs signed an “unprecedented” motion calling for him to step down, which he did only days after the motion was published.
But while fewer MPs signed the 2009 motion, signatories came from all three main parties and a succession of other backbenchers from across the Commons publicly told Mr Martin to resign.
In the current case, only Conservative and SNP MPs have signed the motion, while Mr Flynn is the only party leader to have called for Sir Lindsay to resign.
The full list of MPs who have signed the early day motion is as follows:
William Wragg (Conservative)
Gary Sambrook (Con)
Jill Mortimer (Con)
John Stevenson (Con)
Kieran Mullan (Con)
Anthony Mangnall (Con)
Sir James Duddridge (Con)
Jo Gideon (Con)
Chris Green (Con)
Bob Blackman (Con)
Tom Randall (Con)
Jonathan Lord (Con)
Karl McCartney (Con)
Derek Thomas (Con)
Jack Brereton (Con)
Tom Hunt (Con)
David Linden (SNP)
Stewart Malcolm McDonald (SNP)
Chris Law (SNP)
John McNally (SNP)
Gavin Newlands (SNP)
Pete Wishart (SNP)
James Grundy (Con)
Martyn Day (SNP)
Joanna Cherry (SNP)
Patricia Gibson (SNP)
Brendan Clarke-Smith (Con)
Lee Anderson (Con)
Alison Thewliss (SNP)
Anum Qaisar (SNP)
Sir Graham Brady (Con)
Eddie Hughes (Con)
Sir Geoffrey Clifton-Brown (Con)
Douglas Chapman (SNP)
Carol Monaghan (SNP)
Marco Longhi (Con)
Drew Hendry (SNP)
Rob Roberts (Independent)
Anne McLaughlin (SNP)
John Nicolson (SNP)
Simon Baynes (Con)
Shaun Bailey (Con)
Matt Warman (Con)
Alyn Smith (SNP)
Kirsty Blackman (SNP)
Ronnie Cowan (SNP)
Steve Double (Con)
Danny Kruger (Con)
Miriam Cates (Con)
Dave Doogan (SNP)
Amy Callaghan (SNP)
Sir Robert Goodwill (Con)
Lia Nici (Con)
Brendan O’Hara (SNP)
Jonathan Gullis (Con)
Kelly Tolhurst (Con)
Alan Brown (SNP)
Luke Evans (Con)
Jane Hunt (Con)
Stephen Flynn (SNP)
Ian Levy (Con)
Mhairi Black (SNP)
Richard Thomson (SNP)
Kirsten Oswald (SNP)
Allan Dorans (SNP)
Paul Howell (Con)
Andrew Lewer (Con)
Mark Eastwood (Con)
Marion Fellows (SNP)
Hannah Bardell (SNP)
Ben Spencer (Con)