[2] He attended Eton, and the Royal Military College, Sandhurst.

He served as an adjutant in the Army Fighting Vehicles School, 1937–40; he became a major, 1938.

He was second in command of the Royal Gloucestershire Hussars, 1940–42, and a lieutenant-colonel of the 2nd Derbyshire Yeomanry from 1942.

Lord Allenby married firstly, Gertrude Mary Lethbridge Champneys (1905 - 1988), daughter of Edward Geoffrey Stanley Champneys, on 10 July 1930.

This biography of a viscount in the peerage of the United Kingdom is a stub.