London Mayor attacks decision not to challenge release of black-cab rapist

London Mayor Sadiq Khan joined a chorus of protest on Friday against a government decision not to block the release from jail of a former black-cab driver suspected of assaulting dozens, possibly hundreds of women.Khan said it was "extremely disappointing" that the government was not challenging a decision by the Parole Board to free John Worboys, 60, after nine years in prison.The opposition Labour Party, of which Khan is a member,also called it deeply regrettable.