Identify this Old/Strange Heli
Yesterday at about 1430Hrs flying East to West from Direction of Leeds(EGNM) towards either Blackpool(Egnh) or Liverpool(Eggp) I watched a very strange looking Heli, it almost resembled a Garden shed with a very short yet High fixed tail rotor, and a small diameter main rotor I think it had three blades , was powered by what sounded to be a four cylider piston and was getting along nicely at about 50 /60 knots.
It was darkish green or blue and looked in good nick flying at about 350/450 ft, looked very ancient.
Anybody got any ideas, Ive looked in my books but cant find anything that resembles it with the exception of the front of the Horsa Glider from WW11.
PeterR-B