I never received a reply from
artee. Maybe you're still out there and able to help? I spoke to my dad again the other day and I think we managed to narrow it down to a few options.
April 5th 1990
November 20th 1991
18th February 1992
18th February 1996
It was BAW002 from JFK to LHR. If by some miracle all these were operated by the same airframe, We'd be a little closer!