Alot of the BA fares can be equal if not cheaper, but when you book a flight with an LC airline months in advance, then the LC carrier is usually cheaper.
I must say that LS are quite expensive! I am guessing because of the high fuel consumption of the 733s and that their fares do not reach £200 like FR and EZY.
FR fares start from £10 to about £200, where LS start at £30 to about £150 on continental Europe routes.
I can't see LS offering their July and August flights any cheaper, and looking at the current prices on the Spanish hot-spots, they seem to be booking, especially the ALC daily flights!
Does anybody think that the Murcia, Malaga and Palma routes will operate through next winter?
I would think IF (and a very big if) a national carrier was to start services ex. BLK

then it would probably be LH, as thy would be able to sustain a route from FRA. BA probably no-no with FR on STN run.