A Conservative MP is mounting a bid to stop Keith Vaz from being appointed to the Justice select committee while he is under investigation over a rent boy scandal.

The Labour MP put his name forward after he was forced to step down as the chair of the powerful Home Affairs select committee following the revelations earlier this year.

It follows newspaper reports that he paid two male escorts for their services and amid claims that he was guilty of a conflict of interest as he headed the committee's review into vice laws at the time of the allegations.