Nuclear Disarmament Demonstrations 114. Mr. Marten asked the Secretary of State for the Home Department what was the estimated cost of the special precautions taken by the police and other civil authorities to cope with the nuclear disarmament demonstrations at Brize Norton, Ruislip and Wethersfield air bases, respectively, on Saturday, 9th December. Mr. R. A. Butler The police and prison services incurred additional expenditure in connection with these demonstrations. But it would be difficult to estimate its amount.