 Only the single aircraft was ever completed, the second being cancelled mid-construction.Following the completion of preliminary flights, XN714 was used to conduct a series of one hundred test flights at the Royal Aircraft Establishment's Aerodynamics Flight at RAE Bedford, the last of which being performed in 1967.XN714 was transported to the United States during 1969, where it underwent wind tunnel testing by NASA; following its return to the UK, the aircraft was officially withdrawn in 1972.