With the new apron space about to open and room for 4-5 aircraft, could they not be used for expansion of overnight based aircraft or are they being used for another purpose? However that would put severe strain on the terminal having another carrier based here in the Morning and Evening peak periods.
Im not so sure if LTN needs another airline basing at the airport, but more an airline to serve the airport from else where in Europe...
Like back in the days when SkyEurope had a very healthy schedule from Luton, without having a base here... Maybe an airline like Vueling, Voletea, Transavia or Play?
Real shame to be loosing Sun Express used them 2-3 years ago and were a very decent airline.