|Men’s Field Hockey|
Mantell made his international debut on 10 February 2003. He was a member of the England squad that competed at the 2006 and 2010 Hockey World Cup. He was also part of the winning squad at the 2009 EuroHockey Championship and came third in 2011, and also competed in the Champions Trophy in 2007, 2009 and 2011. Mantell has also represented Great Britain at the 2008 Summer Olympics and the 2010 Commonwealth Games.