Ahhhhmmmmmmm...... yes... well...
In me spotting days (waaaaaayyyyy back in 1979) I visited Elstree by train and foot, and then walked to Leavesden. Navigation was, er, tenuous to say the least - these days I'd have an appropriate map handy - but I made it and even got to Watford safely, to tube it home for tea and medals.
Elstree? Well, Spencer Flack was there then with the ex Haydon Bailiey Sea Fury and, I think, the up and coming G-HUNT. G-FURY and G-FiRE were but then a glint on the horizon... Leavesden was Beech City then - King Airs and Duchesses as I recall...
Hatfield? Twice in the early 80s when the 146 was king, plus the Comet Racer, the late and very lamented Mossie and a low run by a Super Guppy!
Happy days!