It was created in 2018 to replace the Anglo-Welsh Cup after the withdrawal of the Welsh regions.

[2] In the 2017–18 Anglo-Welsh Cup, all four of the Welsh regions finished bottom of their pools.

The matches were typically held over either the Autumn International or Rugby World Cup and Six Nations Championship weekends.

[2] The three pool winners and the best runner-up entered the semi-finals with home advantage given to the team with the better record in the pool stage and the final would be held at the home of the highest ranked club.

The first stage of the competition took place over five consecutive weekends during the Rugby World Cup.