Also remember when a light aircraft possibly a Cessna 150 was allegedly stolen from White Waltham flown in in the early hours of the morning and parked under the wing of our beloved ELAL 747. Pilot never identified and disappeared into the night.
Also on the South side via the Air India / Panam maintenance areas you could drive uninterrupted from the peri road onto the main runway. On the 1st Concorde take off a hundred or so private vehicles were parked on the grass areas adjoining the runway with picnics.