[tobesetc]

PROBLEM SOLVED: Thanks to a guy on Porsche Club GB Forum. At the front of the hard top roof are two flat prongs that mate with the top of the windscreen frame. They have a little plastic cap on them that is prone to come off and get lost. One of mine had done just that, and that side of the car was making all the noise. I just rigged up a very cheap and cheerful solution with a bit of soft plastic I had that was roughly the right size and shape. Put it over the end of the prong and refitted the roof making sure my bit of plastic didn't fall off (easier said than done). It has 100% solved all the rattles, squeaks and creaks coming from my hard top. You would not believe the huge difference such a tiny (10mm x 8mm) bit of plastic could make. I'll be getting a proper cap from PC tomorrow but the problem is now fixed.