Now what?
The distance learning JAA ATPL school I attend (outside UK) only gives you one chance to pass the mandatory test. If you fail, your exam fee(s) at the CAA will forfeit and you will have to wait another 6 weeks to re-take the mandatory. I really don't think that it should be necessary to first pass the mandatory and then book the exams, which would give me 6 weeks to forget what I hopefully learned for the mandatory.
What is the practice in the UK?