§ Mr. Watsonasked the Secretary of State for Air whether, in the making of runways for Royal Air Force machines in Scotland, any change has recently been made in their construction; and whether stone-bottoming is used in every case?
§ Sir K. WoodConcrete runways are being constructed at one aerodrome in Scotland. They will have a sub-base of hardcore or clinker, or both, where the sub-soil makes this necessary. The hardcore includes stone.