Help! Researching 1980 flight details

[Isabel R.]

Hi all,

I was hoping someone could help me make sure that the details are right for a TV show I'm researching for.

A character takes a flight from Sydney to London in the first half of 1980. His flight and gate number are called, and I want to make sure it's not called to a gate that doesn't exist or by a number that isn't realistic.

Does anyone have knowledge of how many gates were used at this time for international departures? And what a plausible flight reference would have been for that flight?

Any assistance would be most appreciated.

Many thanks.