We bet you didn't know these 10 facts about London

Until 1916 you could buy cocaine and heroin over the counter in Harrods

In the 1860s James Spratt invented dog food in London

Britain’s smallest police station is in Trafalgar Square

Only 45% of London Underground is actually underground

Smoking on the Tube was only banned in 1987

In 2014, all the 07.29 a.m. Brighton–London Victoria trains were late

There are 119 species of fish living in the Thames

Oxford Street has the world’s highest levels of toxic nitrogen dioxide

In the 14th century, London had a higher murder rate than any US city today

You can choose “Cockney” as a language on some London cash points

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