What Luton needs really badly is a scheduled airline to come in with good longhaul connections such as EI, KLM, SN or CSA. I thought at one time Finnair might have tried it, HEL is a delightful airport to fly from, they use LTN occasionally anyway, and they have some good longhaul connections. I know this would duplicate routes but think how popular it would be for the huge catchment that do not want the 45 min drive to LHR, and the hassle involved.