Nigel
Obviously not up with current regs. My old chassis never had a tag on it (that I ever found, anyhow), but as it had all the bodywork, etc, it wasn't hard to I.D., and most knew it at the time. Thought there SHOULD have been something like that, but as you point out, there now is.
Been scanning through a whole heap of cars I thought might have been this one....so many look 'similar', but nothing positive. Can't have been too many cars that were painted that colour (even once off the race circuit), so it is a surprise no-one has as yet I.D.'d the thing. In the thread, that rear-end of a car, with yellow bodywork.....bugging me, it looks very familiar, but can't place it. Still......not a lot else to do at times, trawl some more photos.