I really don't think it's possible until your 25 (I'v heard of some lads getting it at 24 if they're already with that insurer)
I'd personally love to have something like a Sierra or Granada as a daily but not possible.

There's actually a 18yo on PistonHeads in the UK with a Morris Minor as his first car.


Try Carole Nash or AxA though, Let me know if you get a result somewhere!