I did the same thing just before JAR came in but I don't think that the regs have changed that much. I was allowed 5 hours off the rotary PPL course and the only extra exam I had to do was the helicopter tech one. Budget around £10k for the whole thing, and don't do what I did and assume you will complete it in the minimum hours - very few do.
There are rotary training schools at Coventry, Wolverhampton, Shobdon. East Mids, Nottingham, Wellesbourne, Tatenhill to name but a few. Depends which side of Bham you live. You will enjoy it!