Mungo Jerry (formerly known as Mungo Jerry Blues Band) are a British rock band formed by Ray Dorset in Ashford, Middlesex, in 1970. Experiencing their greatest success in the early 1970s, with a changing line-up always fronted by Dorset, the group's biggest hit was "In the Summertime", which sold 30 million copies worldwide and is the biggest-selling single of all-time by a British band. They had nine charting singles in the UK, including two number ones, five top-20 hits in South Africa, and four in the Top 100 in Canada.