There is always rivalry between rival fans ahead of any Six Nations match, but none more so than in a classic match like England against Wales at Twickenham. When World Rugby visited now-retired referee Nigel Owens on his dairy farm in the Gwendraeth Valley, 15 miles north-west of Swansea, late last week before Saturday’s match, he wasted no time in joining in the fun. When asked whether referee considers himself to be the best player, the Welshman couldn’t help but make a joke about his English buddy and old colleague, Wayne Barnes, whose only Six Nations appointment in 2022 is against Irelan…