I did make a concerted effort to persuade one of the more senior certification managers at CAA that all this sort of stuff aught to be written down in a CAP so you don't need to pay an expert (ha, who am I kidding!) like me lots of money to explain how the system works.
I thought I was just about winning the argument when he left to work for JAA.
Oh well, at least in the next couple of months we're getting the new CAP 733 explaining all the rules for permit to fly aeroplanes, which will be a major boon.
G