Pete, hate to burst your bubble but the wing section displayed under EE531 at Coventry is not a folding wing section! Its the partially exposed outer wing section from EE223, recovered from Cranfield’s fabled Aeronautical section (along with other goodies) back in the early days of MAM. it was used as an aid to demonstrate the internal structure of typical wing construction.
I also worked on EE531 in its days before being put into the display hangar and never saw any evidence of modifications to facilitate a folding wing mechanism being installed.

I have now sat down rather than bow to your superior knowledge….. 😮 😮 😀

I think it’s all the talk about a certain other airframe with folding bits got me confused 🙁