Interesting on studying the 1979 timetables, that most of the airlines operating then, have passed into history.
B.Cal, Dan Air, Laker, Sabena, Swissair, Clyden, Aviaco, British Airtours, British Island Airways, Ontario Worldair, Avio Genex, Canadian Pacific (CP Air), TAE, Wardair, Trans Europa, TIA, Spantax.
Some items of interest are that Dan Air operated 727s on ITs to and from Gibraltar, given the discusions about aircraft possibly operating into Gib in the future and available runway length, on that thread.
A BIA Heralds used to arrive from BLK, Monday to Friday, then operate out to Rotterdam and back, twice a day.
Dan Air 748s doing Newcastle, Bournmouth, Cardiff and Birmingham schedules.