Six Nations 2012: Wales coach Rob Howley tells players to use the pain of 2010 England defeat and keep discipline Warren Gatland's side, who had Sam Warburton sent off in the World Cup semi-final against France in the autumn, have suffered 10 yellow cards since the beginning of last season, including three in their last three games. What's more, with Saturday's RBS Six Nations game in mind, there are still scars from 2010, when Ospreys" second row, Alun-Wyn Jones, was sent to the sin-bin for tripping England hooker Dylan Hartley. Howley, who confirmed that hooker Huw Bennett is unlikely to play any part in the game because of a calf injury, said: "We remember what happened two years ago. We know the points we conceded when we have a yellow card, especially away from home. We need to be mindful. We have told the players once again that tactics and technical elements come into it when yellow cards are given out. We must not concede silly penalties and give the referee the opportunity to dish out a yellow. Ryan Jones, who led Wales against Scotland, in the absence of Warburton, said: "You don't go into a game to be ill disciplined, sometimes it goes your way sometimes it doesn't. We try to be as disciplined as we can and take our opportunities when we can. But yes, we need to be careful. Although the absence of Bennett will be a blow to Wales, Warburton will return to the openside flank, after missing the Scotland game with a dead leg, and George North is understood to have shaken off ankle ligament trouble.