The Premiership Rugby Shield was launched in 2003 as the Premiership Rugby A League. It runs parallel to the Premiership Rugby seasons. Split into north and south pools, it comprises twelve sides. The clubs select players from their academy and first team squads to make up their A League teams. This gives both young and experienced players the opportunity to play competitive rugby week in week out. Players from feeder clubs are allowed to play under dual registration for additional development benefit. Despite Bristol Bears having played in the Championship for several seasons since 2003. Bristol United have been included in the Shield since its inception regardless of league status.
