Yep, 150 TT is correct - but then remember that if you do the course in the minimum 25 hours, take 2 hours for your flight test...you'll have 177 TT. Not enough to apply for the CPL. 200TT minimum.
Best deal? Get yourself to the 150TT - then start the course but, before you do the test, spend some of your extra P1 hours practising what you have been taught.
I'm assuming you've already passed all the written examinations, have a Class 1 JAA medical and, if going for a UK CAA issued CPL, have passed the UK Radio Telephony Licence examinations.