The time line for these next two quiz items is the fall of 1993.....
56. Only one air carrier was operating Boeing 747-400 service from Frankfurt (FRA) to London Gatwick (LGW) at this time. The flight was operated once a week. Identify this airline. This flight continued on from LGW west across the Atlantic.
I'll guess this was Air New Zealand, who were still stuck at Gatwick at the time, operating FRA-LGW-LAX-AKL.