CAA will redirect you to LASORS for the "definitive" answer to your UK licencing questions. In the (likely) event that LASORS does not answer your query in full, or at all, I suggest that you write (old-fashioned it may be, but it forces a human being to reply) to them for an answer. My experience with the CAA is that they do all possible to avoid tying themselves down to an answer - it took me 6 months of emails, and eventually a complaint in writing to the director of SRG, to elicit a response to a very similar question to yours. Sorry to be negative, but such is the face of today's technology-driven CAA...
...but good luck with your new job!
R7