I remember the first 3 parked up in BOAC maintenance. I was working in a hut in Elgin Crescent at the time, just the other side of the blast screen. They were parked up 'cos BOAC crews refused to fly them until they were paid more money. I went past Elgin Crescent on a bus just before the restrictions this year - the hut is still there. I think those buildings will outlast the whole airport; they're just in a sweet spot that no-one wants to develop. The only difference I can see is that there are now barriers to get in to Elgin and Epsom Square, you could just drive in formerly. You could even just drive on to the airfield at the Eastchurch Road crossing.
BTW, all the roads round Heath Row had names starting with the letter pertaining to their compass orientation, quite clever really so you had an idea where abouts to go. The exception was Beacon Road, on the South Side...
TOO