In the past Air Europa B733 and B734, Iberoworld A320's, Spanair A320's, TUI 733/757, Vueling A319 have all used Southampton to fly direct to Alicante, Barcelona, Ibiza, Malaga, Menorca and Palma so why couldn't the likes of easyJet be able to do the same with a A319/A320.
There is obviously the demand within the Southampton catchment area for those destinations.
Hmmm - the central conundrum which has never been resolved on this thread. A long list of operators and routes which are no longer and then the assertion that there is "obviously the demand"?!