head to head isn't a tie breaker in Six Nations:Lost head to head though.
The Championship positions are decided as follows:
1. The Union with the highest number of Match Points will be placed first and the other Unions placed in descending order according to the Match Points awarded.
2. If two or more Unions finish the Championship with the same number of Match Points, they will be placed according to the difference between the total points scored and the total points conceded on the fields of play in all Matches.
3. If any such Unions also have the same points difference, they will be placed according to the number of tries (including penalty tries) scored by each Union in all Matches.
4. If any such Unions have also scored the same number of tries (including penalty tries), they will be placed equally.

Guinness Men's Six Nations Rugby Rules - Guinness Men's Six Nations
Explore the regulations that govern the battles on the field behind every match in the Guinness Men's Six Nations Championship.