Before my time, but I believe that they built 2 of them. One ran off the end of the runway at Boscombe and blew up, killing the pilot. The self-igniting fuel was always a phenomenal hazard and they built a special isolation hangar at Boscombe to house the thing. It was pulled down a year or two ago when it was deemed surplus to requirements. About 10 years ago I was asked to review Dick Stratton's reports on the performance of the aircraft to assess whether they could be downgraded. Fascinating stuff, and immaculately written.