Thank you very much for all your help and very informed responses. Could he possibly be the young Col. James Henry Thrale Mardall born 7th November 1899, educated Aldenham School, Herts. and RMC Sandhurst, gazetted Royal Fusiliers 20th Dec 1918, Capt 1929, Major 1938, Lt-Col 1940, Col. 1942. Retired 6th Aug 1948.