It was "Zulu Oscar" operating BA4513 from Manchester which was the last Trident Three landing at Heathrow carrying passengers being a fraction of a second behind a LHR-AMS-LHR charter operated by "Zulu Victor". "Zulu Victor" had operated BA's last scheduled international Trident Three service to/from Copenhagen earlier that day. I was fortunate and had flown to Copenhagen and back then on that last Shuttle flight. Happy Days.