
As the train peels off the Great Western line in Hayes it plunges into a tunnel. A very deep tunnel. By the time you alight at Heathrow, it's quite a way to the surface. In fact, on my last visit the other day, it struck me that it's a real problem for claustrophobes and vertigo sufferers (not a core market for air travel, I'll grant you). You have a choice. Rise to the surface on an air-on-all-sides escalator which must climb something like 50 to 80 metres. Even I held on a little more firmly than I normally would. Or take a lift... those small boxes on a cable.
All this just goes to reiterate the engineering feat, most markedly with immense concrete walls rising from the depths. Little wonder that the return ticket price needed to pay for it all was over 3 times the same journey by tube.

Tags: train, airport, Heathrow, engineering, architecture, Brunel
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