That's correct, although once you have the CPL the PPL becomes irrelevant. You'll end up with with a CPL and FI(R) which will get you a PPL instructors job.
The R (for restricted) can be removed after you've done 100 hours instructing, upon the recommendation of a suitable CFI. Whilst you're doing the FI training, it's always worthwhile slipping in the night hours so you can teach night flying too.
As with everything flying, if you want chapter and verse, read LASORS. It's a free download from the CAA website.