Whilst Ryanair may well have decided to start their new routes to Grenoble, Kaunas, Lodz and Poznan from STN instead of LTN, there are according to the runway slot coordinator ACL, virtually no peak-time runway slots left available at STN (stand availability at peak times is also extremely tight).
Therefore, one wonders if Ryanair will be exchanging some STN routes for these new ones and perhaps operating two or three such transferred routes from LTN?
The other option would be to operate them from STN but to utilise off-peak runway slots.
Much as MoL might desire it, you can't get a quart into a pint pot and STN's runway slot availability is just not there at peak times.
Of course, Luton's problem isn't runway slots but stand availability (and as the air traffic guys will tell you, user-friendly airspace).
