My logbook says we were flying LHR-HKG-LHR via BOM with the B747-200. The B747-200 also flew LHR-HKG-LHR non-stop but with a limited load HKG-LHR. Can't remember if we could do non-stop westbound with winter headwinds.
The B747-400 solved the range/payload restriction and my first B744 LHR-HKG non-stop was 12May1990 in G-BNLB (if any of the others is looking
)
Aahh