ISTR there is a minimum P1 time requirement for starting the IR (70hr?) and the MEP. You need to hour build those, then you can use your IR training hours (about 35 actual flight hours IIRC) as part of your hour building towards the 150 required to start CPL training.
Then, unless you have been a very slow learner, after your CPL skills test you will only have about 165-170hr so will need to hour build some more to bring it all up to 200TT (100P1).
Needless to say, best way to hour build is to grab a plane for 4-5 days and fly as far as you can in that time (and back, unless you are ferrying or you have crashed). For best results, do it with another pilot so you get to divide the hours and multiply the experience.