the pre-reg exam is more geared up towards community places so i'm told, but hospital pre-reg pay is around £2-3k more.
I started pre-reg in hospital 3 weeks ago and i'm loving it! :-D
If its still the same as last year, you don't have to accept a place until early october, though when i was asked, it was made to sound more like if i didn't accept the place there and then they'd withdraw the offer. that seems to be where problems lie.