Stansted - Tel Aviv
There are 41 flights per week in November between London and Tel Aviv - I'm guessing there will be more come high season next summer.
El Al won't exit London out of principle. Easyjet are onto too much of a good thing with the location of Luton compared to the residential origin / destination of many passengers. Seems most unlikely that BA would drop TLV from Heathrow.
Is there really room for a 4th carrier and more frequencies on the route ?
Perhaps Milan, Eindhoven, or (if crew overnighting requirements can be managed) Beauvais and Marseille might have more room for capacity expansion...