Atlantic Flight Training also do the CPL(H) course and I think were the first to offer it.
For the UK JAA CPL or ATPL, the ground study has to be with an approved school but there are exceptions. I'd recommend a chat with any (or all) of the schools listed here to find out about this.
However, if it's just the study material you want, suppliers like Transair sell the manuals.
Cheers
Whirlygig
PS - CAA class 1 medical now costs £337.00; I know 'cos I just got mine!!