John Bercow enraged MPs and faced calls to resign after he was found to have affixed a sticker to his car window which said: “b----cks to Brexit, it’s not a done deal”.

In March, the Speaker of the House of Commons was accused by furious MPs of “blatant arrogance” over the decision to place the sticker in his black 4x4, which was seen in his private parking space.

It is understood that the Speaker’s wife drives a different car, while Mr Bercow’s car has a personalised number plate.

His office declined to comment on the issue.

It came after Mr Bercow was embroiled in a row over allegations that he bullied his former secretary Kate Emms, who was signed off work sick in 2011.

John Bercow, Speaker of the House of Commons credit: PA

MPs Paul Farrelly and Mark Pritchard are also facing separate allegations which they deny.

The claims, which the Speaker categorically denies, have prompted calls for his resignation, while MPs yesterday called for an independent inquiry into the claims.

The issue boiled over in the House of Commons on Monday, when Mr Bercow was personally challenged on the floor over his decision to chair an urgent question over a bullying row in which he himself is embroiled.

The controversy came after Mr Bercow was last year accused of political bias after The Daily Telegraph revealed that he had told a groups of students that he voted Remain in the EU Referendum.

His comments appeared to breach the convention that Speakers of the House of Commons do not allow themselves to be drawn into political debate.

He had earlier provoked outrage among Tory MPs when he vetoed the idea of an address by President Donald Trump to both Houses of Parliament during a proposed state visit.

Speaking to The Telegraph, Andrew Bridgen MP said the sticker was a “indication” of Mr Bercow’s “blatant arrogance”.

“The Speaker has never made any attempt to hide his views on Brexit,” he continued.

His comments were echoed by James Duddridge, who said that it was “unthinkable” that Mr Bercow could be allowed to continue chairing debates on Brexit, which he claimed the Speaker wanted to “derail”.

“He is a tone deaf speaker sitting in his ivory tower. He can no longer be an independent arbitrator in debates on such a crucial subject.”