Mosquito test pilot Pat Fillingham signed on John Derry test pilot FDC. William Patrick Ingram Fillingham FRAeS (27 February 1914 – 17 July 2003) was an English test pilot for the de Havilland company. Fillingham flew 120 different types of aircraft during his career including all variants of the de Havilland Mosquito. With the start of the Second World War the company had an increase in aircraft production and by April 1940 Fillingham was test flying 150 de Havilland Tiger Moth biplane trainers a month. By September 1942 he was the chief production test pilot flying new de Havilland Mosquito twin-engine light bombers. In 1943 he went to the de Havilland subsidiaries in Toronto and Sydney to advise them how to test fly the Mosquito, during his stay in Canada he demonstrated the Mosquito at a number of Canadian air bases and also to the United States Army Air Force.  With production of the Mosquito in England increased to a five a day Fillingham flew a record 2,200 flights in the Mosquito. As well as the Mosquito he also flew the twin-engined De Havilland Hornet, at the time the fastest propeller aircraft in the world. Peacetime test pilot. With the end of the war Fillingham still had plenty to do as de Havilland produced the Dove and Heron commercial transports. He flew the prototype de Havilland Canada Chipmunk in Canada in 1946. Military aircraft were still produced and as well as the Dove and Heron, Fillingham is also recorded as flying in the same month de Havilland Vampire jet fighters, de Havilland Canada Chipmunk trainers and Mosquitos. As the company moved into the 1950s Fillingham test flew the four-engined de Havilland Comet airliner and then the three-engine de Havilland Trident airliner. In 1972 he delivered a Trident to China, the first western jet to be imported. By 1975 De Havilland had become Hawker Siddeley Aviation and Fillingham was Deputy Chief Test Pilot when he decided to retire. His last few flying years for Hawker Siddeley he flew the Hawker Siddeley HS.125 as well as display flying the then last flying Mosquito. Fillingham had 11,450 hours on 120 different aircraft types during his career. In 1970 he was awarded a Queen's Commendation for Valuable Service in the Air.