Off Topic but those cars are very fast without the Brabus chip! I realise fuel is expensive but my Dad manages to get 36-37mpg from his CLK320cdi and it can eve get 40mpg+ at a 70-75mph cruise (same engine and similar sized car) and that figure is including some 'spirited' driving. Or do you drive everywhere flat out?!!
On Topic now; I think many people from Cornwall would consider to drive to EXT an inconvenience if they can fly more locally. You also have to factor in parking costs as it would be quite a bit cheaper to just get a taxi to NQY.