Wilkinson calls for England push

"When that happens and everyone works for each other, you achieve that near-to-optimum level which allows you to win big games.

"In the World Cup it comes down to the bounce of the ball sometimes. If you're in that ball park where you can get that last kick to win or you can hang on at the end, you only have to do that a certain number of times and you're in the final.

"We need to work on that and see it happen in front of our eyes in big-match situations and that's why these three games will allow us to see where we are."

However, Wilkinson admits Wales will provide a stern examination of England at Twickenham on Saturday, especially after they ran Australia close away from home in their recent 29-23 defeat in Sydney.

"We've watched a lot of good videos of Wales, and how they played out in Australia against a team that are clearly no slouches was mightily impressive," he said. "And they obviously beat us last time we played against them.

"They've got huge depth of talent and some of the best players coming through the game of rugby at the moment and they are one of the teams that have a very realistic chance of going a long way in this World Cup."

England's World Cup defence begins on 8 September, and they have two further warm-up games against France, with the sides meeting on 11 August at Twickenham and then a week later in Marseille.