Hi, Q (could be a pun somewhere)
From what I know about the CPL(H), you have a few directions you could choose, I understand that you could obtain your PPL, then build up your hours to 155 P1, you could undertake a modular course and a further 30hrs of CPL fly/training, that if you was to be successful, would give you the CPL(H)(R) the R is for Restricted to flying in the UK untill another milestone of hours have passed then you become CPL(H) automatically, this was explained to me by a CFi who is looking to promote the CPL(H)(R), I was a late( in years) starter, but next to fine wine, good food and a buxom lass on my arm, it beats everything, set a target for yourself, and don't deviate, good luck, most of all, if you start, NEVER TAKE RISK'S