Mayor Boris confirms the replacement.
UPDATE : Quick has not resigned from the police service, he remains on full pay and keeps all his entitlements and pensions despite what is technically a breach of the Official Secrets Act.
UPDATE II 09.30 : Sky News reporting he has resigned from the Metropolitan Police. How un-New Labour, to do the honourable thing. Did Boris push him?
UPDATE III 10.20 : Boris Johnson said “I have this morning with great reluctance and sadness…… accepted Bob Quick’s resignation as head of counter terrorism”. Guido was unable to reach Damian Green for comment.