Thanks for the lock Carnut.
Basically the origins of the conversion of this Series 2 Lotus Eleven to a gullwing GT coupe are something of a mystery, as Frank Costin was rumoured to be involved in the bodywork, but when interviewed about it some years ago, he denied all knowledge of it!
It seems the gullwing GT was converted in the early 1960s by the apprentices at the de Havilland aircraft construction school at Hatfield, using many Williams and Pritchard parts. The car was ultimately left outside under a tarpaulin at de Havilland's where it was gradually robbed of its parts, including the engine and bonnet!