In message , at 23:32:46 on Sun, 31 May
2015, Mizter T remarked:
FWIW, Stansted has the highest percentage share for public transport in
terms of surface access (i.e. getting to or from the airport not in a
plane!).

That's easily explained by the train service only (to all intents and
purposes) being to London, and therefore most of the catchment area
simply "has" to drive.
--
Roland Perry