Stoopid,
hugmonster is probably correct (although I don't know the exact setup at Sky Chefs) most catering will be prepared off airfield then driven airside and loaded by the same staff onto the aircraft, but I stand to be corrected.
Also, any link with this geezer and the groundstaff at LGW who reportedly was celebrating the Sept 11th attacks as news was still breaking? (Or was that a baggage handler?)
rm