Anyway, finally got to see the dentist - "How'd it happen? Chewing on lamb bones or something?" - WTF? Does he think I'm a troll? LOL.
He's basically moulded a new half to it out of - er, "tooth paste" I suppose technically, heh. Stuff that hardens really quickly. (If this then falls out he'll have to do drilling and nasty things, but hopefully this will hold).
Dentist: "How does that feel? It's probably a bit higher than the others is it?"
Me: "Nah, it's fine. They don't meet at the back anyway."
Dentist: "Oh yeah, I'd forgotten your amazingly weird bite!"
Thanks for all the good wishes everybody!