Went for MOT today. "Failed on three things Sir, rear nearside position light insecure, rear nearside indicator insecure, rear nearside stop light insecure"
What - three rear lights loose? No...the sealant on the lens had given up (or not been the right stuff in the first place) and the lens was loose. I guess the piece of duck tape I had put on it gave the game away..oh well, lesson learned!
Stripped it down and now just waiting for my sealant to arrive. I'm going to use Sikalastomer 710 as I don't fancy putting my lights in the oven (can't seem to find any Morimoto butyl sealant in the UK anyway) unless somebody knows anything negative about the Sikaflex?