The site for this camp was selected by the local military authorities within the narrow limits imposed by the operational needs of anti-aircraft defence. In addition, consideration had to be given to important factors such as the availability of water supply, existing road facilities, and the avoidance of good agricultural land, and my hon. Friend will appreciate that it is not always possible to find a level site which will meet all these requirements. The extra cost of excavation to obtain a level site for the huts was £350 and for the parade ground and roads £2,150.