Why not a vagina instead?" That is how, on Monday afternoon, I found myself hunched over a map of central London, sketching out a bus route in the likeness of the female reproductive system -- a ...

But have you ever wondered how your favourite bus route got its digits? Well, there’s actually not much of a chronological or geographical order to them. London ... a night bus and SL stands ...

Ride a bus like this (albeit not this exact route) for free this March. Image: Clive A Brown via creative commons Fancy hopping on a heritage bus, and not even paying a fare for the privilege?