House of Commons chiefs have slammed John Bercow for naming a member of staff in his autobiography.
In a statement, Commons authorities said it was "unacceptable" for the former Speaker to name someone in his new book, entitled "Unspeakable", without informing them "for the purpose of financial gain or commercial success."
A House of Commons spokesman said: "House of Commons staff work incredibly hard to enable the effective functioning of our democracy and have a right to expect that their privacy be respected.
"It is unacceptable to publicly name current or former staff without their prior knowledge or authority, especially for the purpose of financial gain or commercial success.
"A crucial element of the work of House of Commons staff is to provide confidential, impartial advice to MPs. Breaking this confidentiality undermines this important principle and also places staff in a position from which they are unable to respond.
"Parliament's Behaviour Code makes clear the standards of behaviour expected of everyone in Parliament, whether staff, members of the House of Lords, MPs or visitors. There is zero tolerance for abuse or harassment.
"We strongly encourage anyone who has experienced bullying or harassment in Parliament to submit a complaint via the independent complaints and grievance scheme.
"In addition, all current and former staff can access the employee assistance programme for emotional support."
It comes after Bercow dismissed accusations he bullied staff as “total and utter rubbish.”
Two senior former Parliamentary officials made complaints about his behaviour.
Lord Lisvane, who was Clerk of the House under his reign, has handed a dossier of allegations to the Parliamentary Commissioner for Standards.
Former Black Rod David Leakey also said he was submitting a formal complaint “detailing allegations of bullying, intimidation and unacceptable behaviour.”
In an interview with Sky News Mr Bercow, who has repeatedly denied all the allegations made against him, said Mr Leakey was “completely and utterly ignorant” of the situation.
He said: “First point is that David Leakey didn’t work for me, he wasn’t employed by me, he wasn’t employed by the House of Commons.
“What we have here is a person who had left the House, is thrashing about, desperate to remain relevant, popping up at every turn, trying to make himself seem very important, centre stage, at the heart of things in the way I went about my work.”
“He worked in and was protocol officer of the House of Lords. He is in absolutely no position whatsoever to comment on my relations with my parliamentary colleagues, of which he is completely and utterly ignorant.
“He doesn’t know what my relationship was with my clerks. He has absolutely no intelligence on those matters whatsoever.
Mr Bercow said he only saw Mr Leakey “three or four times a year over a period of years, mainly in relation to or preparation for ceremonial events.”