Hey chaps, why doesn't the CAA put a photograph of the holder in all UK professional licences! And then we could simply require all operators to notify the CAA whom they employ as aircrew - the Authority could then maintain a computerised record of all professional pilots etc working in this country.
What do you mean 'it can't be done'!
That's great. Take it up with BALPA and the various DfT and CAA. In situations of ID check where all else fails that works for me.