Six Nations and Sanzaar face new battle with World Rugby in bid to scrap relegation

The Six Nations and Sanzaar are clashing with World Rugby over relegation rules in the upcoming Nations Championship, set to include promotion and relegation from 2030. The 10 leading unions have formed a new company called F10 to manage the Nations Championship and handle broadcast and commercial rights for competitions outside the World Cup. These unions fear significant financial losses if any of them are relegated to the second tier of the new competition.