Very true, and thanks again for yesterday's advice. It's amazing how the car feels so much smoother having no annoying rattles! by definition It can't be smoother, only quieter.
Although I have been able to fix temporarily the other issue I raised over the rear door rattling, I swapped over the rubber covered hexagon nut from the nearside to the offside (the damaged nut I superglued the rubber back on) I visited my local Ford dealer (Evans Halshaw) to buy a new nut and look at their micro-fiche drawing (they couldn't find the product when I phoned them) I was informed that the nut cannot be supplied on it's own but only as part of a new RH door roller at a cost of £38.03 plus fitting. I told them that was somewhat expensive for a rubber coated nut but was advised I could leave the roller part in the box and simply unscrew and replace the nut! I find it very difficult to see the logic of paying £38 for a small nut, this part by it's use must be a consumable item, every time the door is closed the pin to which the nut is fitted goes into a locating hole and the rubberised covering ensures a good fit. Salvage yards here I come!!