Geeram, I did the 86 North Weald show on the Saturday so didn't see the Lightnings depart. But I do recall the Northwest 747 and its fighter escorts. All very low...!
I simply don't recall Lightnings on the ground at Biggin but much addling of the grey calls has occurred; I think F-16s always flew from Manston (and once displayed at Kenley in error much to Ken Fitzroy's fury/amusement), but then again Orbis squeezed their DC-8 and DC-10 in as did an RAF VC-10...