It survived the winter.
One sunny Saturday I wiggled in the GRP console as much as somewhere to keep it, put the spare and the tank back in, and put the boot side panel in.
I also did a trial fit of another boot lid but those photos are on another camera. It fitted pretty well and the steel frame, while corroded along the bottom edge, is a lot better than mine where little of the bottom edge remains, the top is a long way gone and the sides far from pretty. The collateral damage was a broken hinge so now need to be a bit careful with the boot when doing the tour - ie I have to do it rather than the tourists.
David