Theresa May has called for tougher parliamentary systems to handle sexual harassment.
The Prime Minister has written to Commons speaker John Bercow saying that the Commons' disciplinary regime needed to be reformed. She said the current regime did not have "teeth" and called for a mediation service to handle complaints.
Under the current system for complaints, MPs are not bound by the decisions of the independent parliamentary standards authority. May said this was unfair on employees.
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Liberal Democrat Leader Vince Cable said: "The Prime Minister is right to be calling for these changes.
"Parliament clearly needs improved procedures to respond to allegations of harassment. The Liberal Democrats have introduced similar changes since a review in 2013, which has proved a positive step."
The letter comes after a series of allegations have been made against MPs.
Conservative MP Mark Garnier will be investigated after claims of sexual harassment were made against him in a Sunday paper.
The Cabinet Office will look into the claims against Garnier, who is the parliamentary under secretary of state for international trade and MP for Wyre Forest, health secretary Jeremy Hunt said yesterday.