To ask the Secretary of State for the Home Department what information he has on plans or studies that assess the measures that would have to be taken by the police or civil defence authorities in the event of widespread contamination by airborne plutonium resulting from a nuclear weapons accident aboard a Royal Navy ship docked at Greenwich.

I refer the hon. Member to the reply given by my hon. Friend the Minister of State for the Armed Forces to a question from the hon. Member and the hon. Member for Newham, North-West (Mr. Banks) on 8 June, at column 724.