You may want to check that their system is actually approved by EASA, and not just just the Swiss.
You can do your flying training while you study - you just can't take the final flight test until you have passed the exams.
I don't know what Britol's timetable is, but can't you do the consolidation in one go? Aside from sticking to their approval, there's no law that says when you do it, as long it it is done before the exams, obviously. We find it's best for students to do it first anyway.