UK CAA has been issuing JAA licences for some years now, so I don't think that it'll make any difference - it sounds to me just as an administrative changeover.
Anything you've been told about the UK CAA CPL is long dead for a new pilot - just ignore it.
The UK CAA document LASORS, which you can find and download from
Civil Aviation Authority Home Page will give you all of the minimum legal requirements.
G