Coloured Radar
Red Devils paradropping under CAS, base 3500. Aircraft inbound to major international airport normally dropped to 4000. The Islander 'lift-attendant' made the occasional request for clearance up to FL120, in which case the aircraft inbound to that major international airport were cleared down to only FL130, naturally. One day, a clearance cock-up: paradrop from FL120, BAC111 cleared down to 4000 ft. On the way down:
BAC 111: "Hey London, we've just passed close to an Islander paradropping"
TMA-SW: "Roger, was it a red one?"
BAC-111: "Blimey, you've got good radar!"