Well, we will see. Blue Islands are operating their JER-LCY-JER schedule via SEN at the moment because their 'new' ATR isn't cleared for LCY.
Who knows, SEN might even get some of LTN's Wizz Air diversions if STN is closed......?
Although I was too young to appreciate it, my brother used to talk about Christmas Eve 1958 when every airport except SEN was socked in. Over FIFTY airliners crowded into SEN including L749 Constellations, DC-6s, Vikings; it must have been bursting at the seams that day.....