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The annual Virgin London Marathon is held for the 33rd year running.
The long-distance event was founded in 1981 as part of the World Marathon Majors and has become known as one of the most popular running events in the world. The marathon also holds the top spot in the Guinness Book of World Records as the largest fundraising event held annually.
The race has been sponsored by British billionaire Sir Richard Branson's Virgin Money company since 2010.