What a delicious story, one I hadn't heard before. Great!!
While we're in nostalgia mode and talking about Tridents, I do recall observing, whilst bimbling about on the airfield, a Trident on short final for 27L (might even have been 28L) The a/c in front was having a little difficulty vacating & the Trident crew were offered a go-around or a change to the northern side. They chose the latter, crossing the Maintenance Area at an angle of 45 deg, acquiring the centreline over the Eastchurch Road and levelling wings in the flare. The Trident was just so amazingly manoeuvrable, although you wouldn't think so from its ground-hugging departure characteristics.
Cheers,
TheOddOne