HC Deb 28 February 1951 vol 484 cc300-1W
117. Mr. C. I. Orr-Ewing

asked the Parliamentary Secretary to the Ministry of Civil Aviation at what hours the surveillance radar element at London Airport is operational; and, when it is closed down, what is the delay before it can be brought into full operation.

Mr. Beswiek

Usually between 0400 hours and midnight. During the remainings four hours it is undergoing technical maintenance but is available at one hour's notice.