5. Travelling on the tube for 40 minutes is the equivalent of smoking two cigarettes - so save yourself a packet, all you smokers and get on the tube more often.
24. The peak hour for tube suicides is 11am.
36. The air in the underground is on average 10°C hotter than the air on the surface.
48. A fragrance called "Madeleine" was introduced at St James Park, Euston and Piccadilly station in an effort to make the tube smell better on 23rd March 2001. It was taken out of action on 24th March 2001 as it was making people feel sick.
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