David Cameron has declined to say whether he believes Sir Malcolm Rifkind should stand down as chair of the Intelligence and Security Committee over cash-for-access claims.
Rifkind has been suspended from the Parliamentary Conservative Party while a probe into the claims take place, but Cameron stressed that the ISC chairman was selected by the committee's members and not the Prime Minister.
"I can't interfere with that - it is a matter for the committee and the House of Commons," he said.
MPs reject proposals for a ban on politicians holding paid directorships, consultancies or trade union roles.
Sir Malcolm Rifkind is to quit as an MP at the general election amid fresh pressure over cash for access allegations.