The armed forces charity Scotty's Little Soldiers is attempting to break the world record for the longest-ever game of rugby union to help raise funds to support the charity. They will be playing for 25 hours non-stop in the Leicester Tigers stadium.
The Military Wives Choir are also singing and the British Army's Red Devil skydiving team will be flying into the stadium with the match ball before the game kicks off.
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The former England rugby captain advises not getting too excited at the start, and keep hydrated while topping up on calories.