Swamp football
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Glorious mud: World Swamp Football Championship held in Finland

15 July 2012 Last updated at 04:43 BST

In 2012's crowded sports calendar, which includes football's European Championships and the Olympics, one contest could be overlooked: The World Swamp Football Championship in Finland.

A popular event, it's not just the sport that attracts competitors and spectators to the mud, as Tim Allman reports.