I thought long and hard at what the problem could be. I searched the internet and looked in a Haynes manuals. even asked Warren if he had any ideas he did but they was about making a bomb to blow up the mice that eaten his cornflakes.
So guessing that's not much help to you I phoned a friend and all he had to say was that was the end of knowledge I not know where it started his knowledge so not much help again sorry fella.
Have you tried suing the Welsh as it always them at fault for pot holes maybe that wiil help