A bit of feedback for anyone suffering the same annoying problem. Just been out a bought a sheet of black sticky back felt - the sort of thing you cut to shape and stick on the bottom of ornaments to prevent surface scratching. Anyway, took off the rear number plate, cleaned it all off nicely on the reverse and stuck a couple of small pads on so that it doesn't rattle/vibrate against th bodywork. Next, there are two hard plastic/rubber buffers inside the striker plate assembly on the sill. I cut to size two felt pads and stuck them on these. Next, I removed the four separate plastic tr