The Premier Division was set up in 2005 for teams who had achieved a certain playing standard and were able to travel further afield to find stronger opposition.

After the 2006 season with other teams withdrawing from National League Three, St Albans Centurions also decided to join the Premier South.

In 2012 it became a standalone league run by the RFL with the introduction of Summer Rugby in the amateur ranks.

Some larger clubs have fielded an A team in this league to bolster numbers and create opportunities for less experienced players to play.

As of 2024: Brighton & Hove RL, Brixton Bulls, Elmbridge Eagles, London Chargers, Medway Dragons, Wests Warriors A.