Gladys Eva, who has died aged 100, was the last surviving WAAF plotter who served in Fighter Command’s operations centre during the Battle of Britain and the Blitz that followed. She was not yet 20 when she joined the RAF as a special duties clerk in March 1940 and, after a few weeks training, she was sent to Bentley Priory, the headquarters of Fighter Command. “I arrived after only a month’s training to prepare us for the vital work in the Filter Centre, “she recalled. “Little did we realise that in a few months we would be engaged in battles for national survival.” Using inputs and observations from radar units, Royal Observer Corps sightings and signals intelligence, an air situation picture was produced at the Filter Centre and it was by using this that the battle was controlled and fought. Gladys recalled that plotting was exhausting work but also exciting, “and the accuracy and speed of the plotters was vitally important.” The plotters were, in fact, the first part of a complex analytical process, which hinged on their accuracy. Gladys had some four months to hone her skills before the Battle of Britain commended in July and she was at the very centre of the action over the whole period of the battle. She was a passionate bridge player and always claimed that this helped her in her work. She rose rapidly through the ranks and, by the time she was 21, she had been promoted to flight sergeant and became a Filter Centre supervisor. In April 1941 she moved to the operations centre of No 12 (Fighter) Group based near Nottingham. She was involved in the Thousand Bomber raids of 1942 and spoke movingly about talking over the radio to pilots heading back to base, some of whom did not make it. The daughter of a Boer War veteran, Gladys May Taborn was born in Wimbledon on December 6 1920 and educated at Kingsley School where she was a keen tennis player. Throughout the war, she served in the United Kingdom at various operation’s rooms in Fighter Command before leaving the service at the end of the war. She worked in the family business in Wimbledon selling musical instruments. In 1959 she sailed on the Queen Mary where she met Fred Woolham. They were married shortly after and lived in Staffordshire. After his death in 1979 she became the housekeeper to the industrialist Victor Eva, who lived in Prestbury Hall, Cheshire, and they were married in 1982.