ok i got some details ..
the mileage tamper light is NOT lit ..
but the date of manufacture of the dashboard is 25/04! .. I suspect this means that either the dashboard has been replaced or its been hooked up to a device thats overwritten things .. its probably been replaced .. WOW! .. but I do have a history of MOT inspections so am still fairly confident of the mileage. (Gotta have faith!)
the vin number is correct
Oh I DID DO TEST21 .. which was a reset! .. it went fine and the clock has appeared .. I only just realised that I had never seen it .. so thats good I suppose
Does any of this shed lioght on my odometer 999999 issue?