Yes, remember going up there, normally to be suffocated, deafened and blown about from the prop wash of viscounts! . Learnt something the other day from a photo taken from that area of some diversions parked in front of the hangers in I think in late 73 or early 74, in the foreground were a couple of BEA tridents and at the back a 111 /500 in a livery I'd never seen before, bit of research revealed it was operated by BEA but with tiny BEA titles on the fuselage and the speedjack on the tail replaced with super one eleven script. Apparently was BEA had taken over a route to Paris from Air France and the one elevens used were painted in this colour scheme to avoid offending the French.