Thanks Pleiades, I suspected as much about moisture in the clocks...luckily when I went to the dealers the misted up screen was at it's worst, so there was no way they could dispute it. Thanks as well for the point about stamping the change on the book...as the mileage is so low I wasn't going to bother, but as you say might save aggro later. Although I have no plans to ever sell it!! Steve