Boris Johnson should be kicked out of the Conservative Party for his remarks about the burka, a Muslim peer says.
Conservative Muslim Forum founder Lord Sheikh told BBC Newsnight demands from the PM for an apology were not enough.
He has called for Mr Johnson to have the whip removed - meaning the MP would no longer represent the Tory party.
Mr Johnson said Muslim women wearing burkas "look like letter boxes" and compared them to "bank robbers". A source said he stood by the comments.
Johnson burka 'letter box' jibe sparks anger
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Lord Sheikh, a former adviser to David Cameron, said: "Take the whip from him. Why not? He's not a super human being, he's a member of the party. The party chairman, the prime minister has the right to take the whip.
"It's not out of order and that's the thing I'd like to see."
Speaking earlier, Lord Sheikh said Mr Johnson's remarks would harm community relations.