No offense but get a better source than Wikipedia then come back. I could have just written that all for you.
None taken. The lead on AirUK came from "No Frills - The Truth Behind the Low Cost Revolution in the Skies" by Simon Calder (page 77, Virgin Books, 2002 - ISBN 1 85227 932 X). Quote from para 3 on said page:
'A perfectly adequate small regional airport had existed for decades, serving mostly cargo, charters and AirUK's network of domestic and European flights
The distinction between charters and the AirUK network is clear. Air UK was eventually to become KLM UK, then Buzz before being sold / subsumed into Ryanair. He also references Cubana flights to Havana via Gander in that period along with others unspecified, but I have been unable so far to corroborate this - hence my not including it in my previous post.
Looking at your links, I would suggest that the Stansted Information website has paraphrased the BAA Stansted website you also reference, and neither is by any means a full history. In the case of the latter, it will want to emphasise the results of the invesment in the Foster terminal to avoid looking like the waste it very nearly became - I remember going on a behind the scenes visit with the then Chartered Institute of Transport in the early 90s, and it was dead. I also have Siobhan Creatons book, but it mainly concerns the Ryanair inolvement, and does not delve into the history of the airport, other than dealing with the purchase and dimembering of Buzz to gain slots at Stansted. I still contend therefore that Stansted was a scheduled airport,and was available as such, prior to the Foster terminal opening in 1991, albeit at a low demand prior to the lo-co revolution.
Edit : image of 1981 Air UK timetable cover can be found here : http://www.timetableimages.com/i-uz/uk8111a.jpg
showing airports served. London Stansted is clearly shown, and none of the other airports shown are really charter destinations.
Edit 2 : Flight Global ; http://www.flightglobal.com/pdfarchive/view/1980/1980%20-%201899.html
confirms that Air Anglia were operating scheduled services here in 1979, quote :
Air Wales, formed in August 1977,
ceased operations in April 1979, and was
taken over and absorbed into Air Anglia
in June 1979. The resulting extensive
network of scheduled passenger and
cargo services link 22 airports in Britain
and 11 in Europe. Points served are
Aberdeen, Amsterdam, Basle, Belfast,
Bergen, Birmingham, Blackpool, Bournemouth,
Brussels, Dublin, Dusseldorf,
Edinburgh, Exeter, Glasgow, Guernsey,
Humberside, Isle of Man, Jersey, Leeds/
Bradford, Le Touquet, London/Gatwick,
London / Heathrow, London / Stansted,
Manchester, Newcastle, Norwich, Ostend,
Paris, Rotterdam, Southampton, Southend,
Stavanger and Teesside
Proof positive that Stansted WAS in use as a scheduled airport prior to 1991.