Just Language Kingdom on its own (Asturian company) moves more than 4.500 students through London Stansted for its languages courses held abroad every year. These students will have to travel from other airports in the future, like Santander. Alternative routes from Asturias Airport won't be cost effective, as Ramón Villa, Language Kingdom CEO has confirmed.
Victoria Line (Underground, Zone 3) can be reached in 35 minutes. Liverpool Street Station can be reached in 47 minutes. This is a 24/7 service. Tickets costs only £7 if booked in advanced.