looking at the timetables, looks like there are going to base a couple of aircraft at STN for these flights. I think there operating them to utilise the aircraft when the scottish winter routes are cut back, ie GLA-PFO, PMI, FAO & NCE and EDI-BCN, FAO, NCE, PMI, PRG & FCO.
Too me it makes sense, and give some of the "London" lowcost airlines a run for there money, as having flown GSP, EZY & FR, its has definately got a better product.