- London ranked as the 6th most expensive city in which to live in 2016.
- London was founded by the Romans, who named it Londinium.
- In London,
- it is illegal
- to die
- Despite its name, more than half of the London's Underground network in fact runs above ground.
- Over 300 languages are spoken in London, one of the most diverse cities in the world.
- There's a Cereal Cafe in London where you can eat hundreds of different kinds of cereals from around the world.
- London only reached its pre-WW2 population level in January, 2015.
- To be a London black cab driver, one is expected to know over 25,000 roads and 50,000 points of interest and pass a test called "The Knowledge."
- Today's British accent first appeared among London's upper class around the time of the American Revolution. Before that, the British accent was similar to that of Americans.
- In 2012, London became the first city to host the modern Summer Olympic Games three times.
- In the 16th century, a London law forbade wife beating after 9:00 P.M., but only because the noise disturbed people's sleep.
- In Victorian London, people were paid to collect dog poop. It was used to tan leather.
- The world's first traffic signal was short lived. Installed in London in 1868, it exploded less than a month later, injuring its policeman operator.
- The London Underground was originally intended to terminate in Paris.
- London is still paying rent to the Queen on a property leased in 1211. Horseshoes, 61 nails, an axe and billhook are part of the rent.
- Despite being a 177 m (581 ft) tall structure in the middle of central London, the location of the Post Office Tower was a national secret for years.
- London's after-hours economy generates £26.3bn ($32.3bn) every year.
- Every week, London Underground escalators travel the equivalent of twice around the world.
- 10,000 foxes live in London.
- 70% of all train journeys in England start or finish in London.
- There are so many trees in London, it can be classified as a forest, according to a UN definition.
- Young Londoners spend almost 60% of their income on rent alone.
- It is believed that London's Big Ben was named after Sir Benjamin Hall, First Commissioner for Works, whose name is inscribed on the bell. Others attest that the bell was named after Ben Caunt, a champion heavyweight boxer.
- The London Bridge built in the 1830s was dismantled in 1967 and relocated to Arizona.
- The London Underground trains were originally steam powered.