A tangent to the main thread: M.R.D.Foot in his autobiography "Memories of an S.O.E. Historian" (2008) says that on 3 March 1939 he was posted to the 35th Searchlight Battalion of the Royal Engineers (Territorial Army) which had been formerly been the 1st Surrey Rifles, 21st London Regiment. In March 1939 the unit had two drill halls: dull yellow brick, cold and draughty buildings in Flodden Road, Camberwell, and a brand new building in Lordship Lane, Dulwich. Was the 1938 or early 1939 new drill hall on the High Wood site or elsewhere on Lordship Lane?