That's not quite what I meant - I was observing that if the club chooses one or the other to run, I would prefer the Post Classic as my only vintage bike is a 1980 model. If they go Classic, I will need to find a bike somehow.
I can't speak for the club, but I suspect when they applied to run the titles they didn't realise that firstly it has been divided into Classic and Post Classic, and secondly that Post Classic now includes Pre 90. That is a helluva lot of classes to run if you take on both divisions at the one event. I take your points, but my guess is they'll come down in favour of just the one division. But which one?
As I said though, it's up to the club to decide, so as soon as I hear I'll let everyone know.