What is the London Marathon?
The London Marathon is a major marathon race held in London each spring, usually in April. Since its first race in 1981, it has become one of the world's largest marathons and raises huge sums for charity.
The marathon was founded by former Olympic champion Chris Brasher and athlete John Disley, inspired by the New York City Marathon. The first race in 1981 had around 7,000 runners.
The course starts in Greenwich and Blackheath, passes landmarks such as the Cutty Sark, Tower Bridge and Canary Wharf, and finishes on The Mall near Buckingham Palace.
Elite racing and fundraising
The London Marathon is one of the World Marathon Majors, attracting the world's best runners. Many world records have been set on the course.
Tens of thousands of people take part, many raising money for charities. The marathon is said to be the largest annual one-day fundraising event in the world.
Many runners wear fancy dress, and Guinness World Records are often attempted, such as the fastest marathon dressed as a fruit or a cartoon character. Entry places are usually allocated by ballot because demand is so high. The race is broadcast on BBC television.