NA 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; 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. 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 and Valour in the Trenches.
