Even in Winter, a warm breeze of body odour wafts out of every truly subterranean Underground station (there are some stations on the Underground network which are above ground, even elevated, but that is to be expected). This perfume is distinctive, attractive, almost, to the seasoned traveller on The Tube. It represents shelter from the rain, warmth all year round, relatively cheap and rapid transport. It has enough built-in redundancy to allow most central zone journeys to be completed in a number of ways.