Saarbrucken?????
I lived and worked in Luxembourg for a few years, Saarbrucken is a poor person's Luxembourg, very few people actually want to fly to/from there, correct me if I am mistaken but has there ever been a LHR/Saarbrucken service? ..... And if LHR/Saarbrucken isn't viable then go figure what chances SEN, LGW, STN, LTN or wherever ..... such a route will last about one season or less