Thank you so much for your reply's, Herrie and Bitsobrits as they both certainly helped. I took on board some advice and replaced the rivets on the back panel with rivnuts so it will be a tad easier next time. It is all done, at last, and I can also now offer some advise. I decided to replace both belts although it was only the passenger that was not un-reeling ( think I made that word up!) . I got hold of a UK company called BHIuk and spoke to Graham White. He could not have been more helpful and said he would replace the mechanism ( not the belts) on both, with a German brand that would never give me the problem again. And said he would turn them around in a day if I sent them to him. Which he did and the bill was around £84 in total including post and pack which I thought was very reasonable.
The only issue, and this is some thing he would not have realised, is that the hole in the new brackets were about 5mm off the hole in the car as they could not go down far enough being of a slightly different shape but I made some adjustment to solve this problem. His tel in 07792594354 if you have a similar problem and I have no affiliation with this company. Again thanks for your help it is much appreciated.
