Jonny Wilkinson says England’s World Cup hopes rest on self-discipline

England’s 2003 hero is sitting out his first World Cup for 20 years but remains something of a moral guardian as the squad prepare for this year’s editionThere are still 100 days to go until the Rugby World Cup starts but Jonny Wilkinson is already having withdrawal symptoms. For the first time since 1995 the global tournament will be going ahead without him and he is starting to appreciate just what he is missing. Back at Twickenham as a tournament ambassador on Wednesday he even used the word “torture” to describe his current emotions as the 2015 edition looms.As Wilkinson was swift to stres…