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Disgraced Keith Vaz has shamelessly accused a fellow MP of harming his reputation and reported him to Westminster’s sleaze watchdog.

The Parliamentary Standards Commissioner opened an ­investigation into the Labour MP after the Sunday Mirror revealed he paid male prostitutes for sex.

The probe was triggered by Tory Andrew Bridgen, who spent months investigating the former Europe Minister.

But Mr Vaz has now reported Mr Bridgen to the same watchdog – accusing him of breaching its Code of Conduct.

In letters seen by the Daily Mirror, Mr Vaz suggests his rival’s complaint was outside the watchdog’s scope.

He highlights a section of the rules that says the Commissioner cannot probe matters relating to MPs’ conduct “in their purely private and personal lives”.

Mr Vaz quit the Home Affairs Select Committee – which is probing vice and drugs – in the wake of the scandal.

The Parliamentary inquiry is on hold while police decide whether to investigate.

In one meeting with escorts ex-lawyer Vaz offered to cover the cost of cocaine if it was brought to the “next meeting” but made it clear he did not want it himself.

When it resumes, the Parliamentary inquiry is expected to focus on whether Mr Vaz broke the rule that states: “Members shall base their conduct on a consideration of the public interest, avoid conflict between personal interest and the public interest, and resolve any conflict between the two, at once, and in favour of the public interest.”

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The Parliamentary Commissioner’s office confirmed it was inquiring into Mr Vaz.

Constituents in Leicester East have called for him to step down.

Mr Vaz’s solicitor did not respond to our request for comment.