(09 Jul 2014, 8:47 pm)G-CPTN wrote These things fester away until some smart vehicle examiner (or would-be hero cop) challenges it and tests it in court - just as some driver-training organisations used oversize L-plates until it was pointed out that they were illegal.
Let's not forget that the white roller blinds on TfL vehicles and Lothian Buses vehicles will all be lit up at night, and hence could be argued as providing white light.
Operators up and down the country have white rear destinations, so there must be a workaround to this alleged "law", because as I've said previously, those who manufacture these destination displays just wouldn't do it if it meant that bus operators were going to turn around and have to replace them. I also doubt that bus operators would incur the additional cost of buying white opposed to amber if they had even the slightest incline that it was illegal and there was a chance they'd have to remove them - not only would it tarnish their reputation, but there's also a chance that the manufacturers wouldn't refund the difference.