EZ may not wish to expand at LTN, but the fact is no-one can!
LTN barely copes with the load it's currently got. One look at the chaos outside airside departures when more than 2 aircraft load is proof positive and conclusive.
With all the investment of recent years I have seen squre root of no improvement in the overall operation at LTN.
Any operator wishing to expand at LTN will surely have to wait until the airport can get it's act together first!