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

F10 unions fear financial loss if they play in second tierPromotion/relegation set for 2030 Nations ChampionshipThe Six Nations and Sanzaar are facing another battle with World Rugby over a desire from some unions to ensure that none of them can be relegated from the Nations Championship.As reported last week by the Guardian, the 10 leading unions have set up a…