 In 2010, Barnes officiated his first Heineken Cup Final between Toulouse and Biarritz at the Stade de France, Saint-Denis, on 22 May.After officiating at his second Rugby World Cup (in New Zealand) in 2011 and presiding over the third/fourth place play off game between Wales and Australia, Barnes refereed the Heineken Cup semi-final match on Sunday 29 April 2012; Clermont Auvergne v Leinster.Barnes was one of the officials present at the Pacific Nations' Cup in Japan in 2013.