Terrorists linked to Al-Qaeda may be planning to buy former NHS ambulances and police cars to mount suicide bomb attacks in Britain, MI5 has warned. They may import a tactic already used in Iraq and Israel, according to a report by MI5’s Joint Terrorism Analysis Centre to chief constables. In a statement to The Sunday Times, the Association of Chief Police Officers also warned of the risk of such an attack. It said ministers must legislate to stop the sale of such vehicles. Its move has been backed by Lord Carlile of Berriew, the government’s terrorism watchdog. He said he...