IWM Photo: H 14918. Part of the War Office Second World War Official Collection. Staff Sergeant Mabel Kathleen Twist, thought to be the only person of her rank in Northern Ireland was commended by Auxiliary Territorial Service Chief Controller Jean Knox as the 'smartest woman in the A.T.S.'. Photo taken on 22nd October 1941 by Lieutenant J.R. Bainbridge - War Office Photographer.