In this week’s Sport: Frankie Dettori, the world’s most famous jockey, talks exclusively about his career of ups, downs and more ups | David Flatman on how England must fight for their World Cup lives | Australian centurion Adam Ashley-Cooper says his team will feel right at home at Twickenham | Scotland captain Greg Laidlaw looks ahead to his country’s big Test against South Africa | Ian Poulter on his sporting mentality and how he feels about hitting 40 | Former F1 driver Mark Webber tells us what’s wrong with the sport that made him famous