As wub said, not a single airworthy example exists. The last one to fly, if I recall rightly, was the one now at Duxford and that was in the late 1970s. Rumour has it that when Mike Beachy Head bought the ex-Stanmore Park gate guard he thought he was getting something that could be restored to fly. Of course it wasn't any such thing and now does similar gate guard duties at his Thunder City facility at Cape Town airport.