It would be wonderful to hear more recollections of Sopwith Jr. and Endeavour Aviation and to discover images of the remainder of his fleet, especially his rotorcraft: G-AVZG, G-GINA and G-IINA.
I've been quietly enjoying this thread for sometime now, and I would like to thank all the contributors - it's been an education.
I certainly remember seeing G-GINA / G-IINA and Shoreham Airport on a fairly regular basis in the late 1980's (when I were a lad). Can't say much more than that other than I thought that it was something to do with Recardo's engineering as it always seemed parked close to their building. I am prepared to accept that this information is very wrong now!