Capt Wanabee
The actual directive is quite clear and it does not state the ID must be issued by BAA, only that it is a valid ID issued either by the aerodrome or by another competent body authorised to issue passes.
Surely all airlines in the UK have airport passes for their aircrew at their main operating bases.... don't they? If not it is clearly an issue with the airline concerned and nothing to do with the BAA or security. Is someone trying to save costs by getting round the system?