The De Havilland Museum is suspending plans for the 80th anniversary of Mosquito News By Daanish Rao Last updated Nov 25, 2020 0 Share The DH98 prototype, first flown on November 25, 1940, was the first exhibit at the de Havilland Aircraft Museum in Hertfordshire when it opened in 1959. 80thAnniversaryHavillandMosquitoMuseumplanspostponing 0 Share