HC Deb 19 January 1987 vol 108 c456W
Mr. Dalyell

asked the Secretary of State for Defence on how many occasions, and for how long on those occasions, the ballistic missile early warning system site at Fylingdales has been out of operation during the past five years.

Mr. Stanley

It would not be in the public interest to give specific details of the operational availability of the ballistic missile early warning system at Fylingdales, but it has proved exceptionally reliable. It has been out of operation for less than three hours in total over the last five years.