Ninety-three-year-old Eileen Younghusband served as an officer in the Women’s Auxiliary Air Force in WW2. She decided to volunteer at the age of 18, and her mathematical abilities led to her training as a Clerk Special Duties, a vital part of the Radar chain. She found herself working in the Filter Room, the lynchpin between the coastal Radar Chain and the successful defence of Britain. She tracked the V1s over Kent and London and gave the first ‘Big Ben’ warning of a V2, which landed on Chiswick on 8 September 1944. After losing two fiancés, she eventually married; only to be posted overseas six weeks later to Second Tactical Air Force in Belgium. There she became part of a team tracking and destroying V2 launching vehicles, responsible for the devastating raids on Antwerp – the Allies’ vital port for landing troops and supplies. She tells her story to The Telegraph’s Martin Chilton.