Technically, its the 'forward stop line'. Quite a lot of cars stray into it too - technically, its an offence to go over the stop line, for any vehicle. The only time it would bother me, whilst on my motorbike, would be if the junction had some sort of camera on it, which
could pick up an offence. In reality though, cameras are more likely to be for 'red light' offences. So....in the way that most of us exceed the speed limits once in a while, and take the chance, I'll continue to make my way to the front of a queue of standing traffic, and sit in the cyclists' box...and then be on my way! If it annoys a few people sitting in the aforementioned queue....er....tough! Of course, if the box is full of cyclists, I'll afford them precedence.
And in any case, there's no one out there prosecuting such trivia....which is probably a good thing. :bannana:
Pete