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This photo was taken in the 1980's when coaches could park in the dry and marks the first stage of terminal expansion before the rear departure lounge was built. Later on the coach lane closed as the arrivals area was expanded and at the other end a new set of check-in desks were build. I can only ever remember them being used by Capital Airlines. This old check-in area is now in part the location of the airport chapel.
This frontage will disappear over the next 2 years as the extension to the new terminal will cover the existing bus station.