I see this summer Ryanair have increased slightly the number of aircraft doing W patterns from other bases i.e. Gerona, Kaunas which arrive at less busy times. I would have thought that if they were to increase flights at Luton this is where the extra capacity might come from but of course it all depends on price as someone has already said earlier.
Also Monarch now seem to have four aircraft based instead of five last summer so there is one more overnight stand available I would suggest maybe Wizz might take that one.