Warren Gatland's Grand Slam champions opened their campaign with a 26-13 win over Scotland at Murrayfield. 606: DEBATE Give your thoughts on Gough's comments Since Sunday's win, the Welsh have been further buoyed by the news that they have achieved their highest-ever world ranking.

Wales have leapfrogged Argentina into fourth in the International Rugby Board list, with England remaining in sixth spot. New Zealand are top, followed by world champions South Africa and Australia. England have called up flanker Joe Worsley and centre Mike Tindall for the daunting trip to Cardiff, while Wales have delayed team selection until Thursday. That is to give Shane Williams, Ryan Jones, Gavin Henson and Jonathan Thomas extra time to recover from injury.

Mark Jones' progress following appendix surgery last month will be monitored, while Gareth Cooper looks unlikely to recover from a knee injury. Since Sunday's win, the Welsh have been further buoyed by the news that they have achieved their highest-ever world ranking. Ospreys wing Williams has urged caution on the wave of optimism sweeping through Welsh rugby. You can never write off England

Wales wing Shane Williams "[England] would be the first to admit they didn't play well against Italy, but they still won the game," he said. "That is credit to them. They capitalised on a lot of mistakes by Italy. "There are a lot of new faces there, but they are still a very good side and, make no bones about it, the game on Saturday is going to be very tough. "We just need to prepare ourselves for a battle up-front, and a confrontational battle in the backs as well, because they have got some exciting players there. You can never write off England."

The history of rugby union follows from various football games played long before the 19th century, but it was not until the middle of that century that rules were formulated and codified. The code of football later known as rugby union can be traced to three events: the first set of written rules in 1845; the Blackheath Club's decision to leave the The Football Association in 1863 and; the formation of the Rugby Football Union in 1871. The code was originally known simply as "rugby football"; it was not until a schism in 1895, which resulted in the separate code of rugby league, that the name "rugby union" was used for the game itself. Rugby union stuck to its ideals of amateurism and it was not until 1995 that the game turned professional.

Playing football has been a long tradition in England and versions of football had probably been played at Rugby School for two hundred years before three boys published the first set of written rules in 1845. The rules had always been determined by the pupils and not the masters and they were frequently modified with each new intake. Rules changes, such as the legality of carrying or running with the ball, were often agreed shortly before the commencement of a game. There were thus no formal rules for football during the time William Webb Ellis was at the school (1816–25) and the story of the boy "who with a fine disregard for the rules of football as played in his time, first took the ball in his arms and ran with it" in 1823 is apocryphal. The story first appeared in 1876, some four years after the death of Webb Ellis, and is attributed to a local antiquarian and former Rugbeian Matthew Bloxam. Bloxam was not a contemporary of Webb Ellis and vaguely quoted an unnamed person as informing him of the incident that had supposedly happened 53 years earlier.