Rons,
A lot of UK modular schools (and from September, PTC, Ireland) are doing a combined Multi-CPL & IR course. It usually works out cheaper than the traditional IR which often involves the relatively pointless hours in a single engine complex such as the Arrow etc. (Yes it can be good for transition to the twin, but why not fly a complex during your hour building instead?)
It also means you end up with more valuable Multi hours, up to 70 if you can afford it(!), but realistically 30/35 is common.
Anyway, in relation to your original question:
Requirements for ISSUE of CPL:
Valid PPL & Medical obviously, plus:
Integrated: 150 hours total time - 70 hours PIC.
Modular: 200 hours total time - 100 hours PIC.
Requirements for ISSUE of an IR:
IR Theory Exams passed.
Same requirements for Integrated & Modular:
Single IR:
50 hours of which 20 may be in an FNPT I or 35 in an FNPT II.
Multi-IR:
Without a CPL: 55 hours of which 25 may be in an FNPT I or 40 in an FNPT II.
With a CPL: 50 hours but since "At least 15 hours must be in the category of multi-engine aircraft for which the IR is sought", max FNPT II time is 35 hours, instead of 40.
Cost wise, between EUR16,000 & EUR19,000 for Modular. I don't know about Integrated.
I've purposely left out cross-country and night time in relation to the above but if I've forgotten anything vital, I apologise in advance.
Hope this helps,
Simon.