::France will clinch the championship and Grand Slam if they beat England, while a draw will also be enough.

::Provided Ireland do not rout Scotland by 50 points or more, France can afford to lose by less than seven points and still be champions.

::England, to retain their RBS 6 Nations crown, must beat France by eight points or more. A seven-point margin would also be enough, as long as they stay ahead of France on overall try-count, which currently stands at 15-12 in Englands favour.

::If England and France finish level on points, points difference and try-count - and Ireland do not go on a scoring spree - then England and France will share the championship.

::To have any realistic chance of championship glory, Ireland must defeat Scotland by 50 points at least, and hope that events in Paris work in their favour.

::Ireland, though, just need to beat Scotland to secure their first Triple Crown for 19 years.