England captain Chris Robshaw poses at the Millennium Stadium ahead of his side's title showdown with Wales © Getty Images

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Chris Robshaw has demanded England make the most of every opportunity that comes their way in the Six Nations title showdown against Wales on Saturday.

Six Nations Permutations

• England win the Grand Slam - An England victory by any margin would secure a first Grand Slam triumph in a decade.
• England win the Six Nations title - An England defeat by six points or fewer would still be enough to seal the title.
• - If England lose by seven points but outscore Wales by three tries or more then Stuart Lancaster's men would win the title.
• Wales win the Six Nations title - A Wales victory by seven points, providing they stay ahead of England on tournament tries, would see them retain the title.
• Six Nations title shared - If Wales win by seven points but England score two more tries then the title would be shared.

England spurned several scoring opportunities as they laboured to a an 18-11 victory over Italy last weekend and Robshaw is aware that a similar lack of precision could cost his side the Six Nations title and their first clean sweep since 2003.

"When you come to a place like Cardiff, you might get one or two chances, and we've got to make sure we are good enough to make it count, whether it is the first minute or the 80th minute," Robshaw told PA Sport. "It is one thing saying it and it is another thing doing it. That is the challenge we have.

"Of course, everyone wants to go out there and win, but it is about how you go about it and breaking it down into the smaller, finer detail. We can't afford to switch off at all or lose concentration or lose our composure. If we get a chance in the first or 80th minute we need to be mentally prepared and right up for it.

"It's a huge occasion for English rugby, and there is a massive opportunity out there for us if we can go out there and hopefully deliver on what we've talked about."

A resurgent Wales know a victory by seven points or more would likely be enough for them to spoil the party and retain the Six Nations - a fact not lost on Robshaw.

"We know what happens if we win, and we know what happens if they win," Robshaw added. "Both teams know exactly what they want to get out of this game and it is about showing that intent from the off. Both sides will want to get off to a great start and build momentum from that.

"We've been to intimidating places before, the likes of Ellis Park (in Johannesburg), and Wales is definitely up there. People speak about it as probably one of the best places to actually go and play rugby.

"If you give the crowd an opportunity to get into the game in the first 10 minutes, then it's going to be a long old afternoon, as we found at Ellis Park (last summer), when we were 20 points down in 20 minutes. It is about making sure that in the warm-up we soak up what it is going to be like, and make sure when that first whistle goes we are mentally prepared and ready to give it our all."