 He flew the prototype of Barnes Wallis's geodetic aircraft the Vickers Wellesley bomber in June 1935.He was landing this aircraft on 23 July when the port undercarriage collapsed, resulting in several months in the workshops to repair serious damage to the wing.He flew the prototype Wellington bomber, K4049, with Wallis and Trevor Westbrook (the factory's general manager) aboard, at Brooklands on 15 June 1936.