NS Tank' Nash CBE was educated at Latymer Upper School before entering the catering industry with J Lyons and Co Ltd. He enlisted in the Honourable Artillery Company in 1957 and served until conscripted for National Service in 1960\. Briefly a Royal Fusilier, he was a member of the Army Catering Corps for thirty years, rising to the rank of Brigadier. He resigned his commission in 1991.For thirty-three years, from 1973, he wrote humour under the pen name Sustainer' and his work was published internationally in a variety of military journals. There are three anthologies of his column: Reveille & Retribution, (1997), Spit & Polish (1999) and Friend & Foe (2001). His books for Pen and Sword include K Boat Catastrophe, Strafer' Gott -Desert General, Chitral Charlie -The Rise and Fall of Major General Charles Townshend, Valour in the Trenches and Betrayal of an Army - Mesopotamia 1914 -1916.