The Tower controller couldn't believe it either. He saw some lights to the north so 'phoned down to approach to ask 'who's that coming down H9?'.
The boundaries were somewhat different in those days...like some 'interesting' and optimistic switching runways (days before 'stabilised approaches'...) and some fly-bys from F111s dumping and torching. When it was slack (yes, slack...) if there was anything interesting on Special we'd ask it to do a fly by...eg. a formation of Daks. HD might have a few stories, he was there in even madder times...