Dave W
Very interested in the comments regarding the Gnat T1 and it's flying controls. I was a draughtsman in the Folland Design Office 1954 -1965 and worked on the flying controls section on the Gnat trainer. I wouldn't say the Elevator control system was complex but the Hobson unit and the electric trim did give some problems initially. The main problem as far as the RAF were concerned was the lack of longitudinal feel and the manual reversion system. Yes there was a Folland swing wing aircraft design, the FO148, not a swing wing Gnat but much larger and eventually contributing towards the MRCA and the Tornado, I worked on this design in the project office - we have the large low speed wind tunnel model of this aircraft in the Solent Sky museum in Southampton.