The Smallest Police Station
Many people will show you this bit of London trivia - the smallest Police station in the world - but it seems that few tell you why it is there - even Diamond Geezer doesn't tell you why.
The answer is quite straightforward. Back in the 19th Century, lots of distruptive trade union types decided that the square was a good place to agitate. So the police decided that they needed an oficer to keep an eye on the troublemakers, hence the slots. That's it. The light reputedly comes off Nelson's flagship, HMS Victory.