Sure. But easyJet, for example, would only be interested in something like STN-LDY-STN-XXX-STN-XXX-STN-LDY-STN (and the "XXX" probably destinations rather far away on the continent give the short sector time for the LDY rotations). That is, of course, unless they get enough money from the public that they will happily ruin the utilization of the aircraft.
Is a requirement in the tender (could not find it on the internet) that, for example, standard luggage must be included in the air fare? Or any other "frills"?