Many trips to London from MIA in the 90s. There where two daily flights to London - a 747-400 to LHR and a 747-200 to LGW. I flew the upper deck of the 747-200 several times... nice way to go for a 20-something on a budget!
(Edited:
can I help you is correct, the LGW fleet was -200's, not -300s. I confused myself with the couple of JAL -300 JFK-NRT flights from back in the day)