I don't think there is any chance that easyJet will do LDY while they have operate from BFS.
To go back to the Ryanair issue again, this is not particular to LDY, they have also requested runway extensions at other airports on their network. It is a slightly unusual case, since in the past airlines would decide on the most suitable aircraft and powerplant combination (in terms of max thrust etc) to operate the airfields that they operate to or plan to operate to. In Ryanair's case, I understand, they have gone for the low thrust version of the CFM56 for the 737-800 (to save on operating costs), and are looking to the airport owners to extend their runways to allow the aircraft to operate.
Another example of Ryanair turning the previous way of doing things (or in MO'L's terms "bolloxology") of airlines on their head!!