Well that was a surprise. Decided to take a spin on a Class 66 to see the new flashing amber signals and discovered I was driving 56232! I hadn't realised that BR had built so many. Must say they look remarkably like Class 66's.
To be fair........ 66,232 is a VERY LARGE number. When was the last time you counted up to a number this high? ;-) You can't expect people to get everything right all of the time....!