St January 1975 on Headed Paper From Air Chief Marshal Sir Andrew Humphrey GCB,OBE,DFC,AFC, Ministry of Defence, Main Building Whitehall, London SW1A 2HB. Marshal of the Royal Air Force Sir Andrew Henry Humphrey GCB OBE DFC AFC (10 January 1921 – 24 January 1977) was a senior officer in the Royal Air Force.
