Current

• Leeds Rhinos
• St Helens
• Warrington Wolves
• Wigan Warriors

Former

• Ace Amateurs
• Ace Caravans
• Barrow Raiders
• Batley Bulldogs
• Blackpool Gladiators
• Blackpool Panthers
• Bradford Bulls
• Bramley
• Bridgend
• Carcassonne
• Carlisle
• Castleford Tigers
• Catalan XIII
• Crosfields
• Dewsbury Celtic
• Dewsbury Rams
• Doncaster RLFC
• Dudley Hill
• Egremont Rangers
• Elland
• Ellenborough
• Featherstone Rovers
• Halifax Panthers
• Hemel Stags
• Hensingham
• Heworth
• Huddersfield Giants
• Hull FC
• Hull Kingston Rovers
• Hunslet RLFC
• Irlam Hornets
• Jubilee
• Keighley Cougars
• Kells
• Kippax White Swan
• Leigh East
• Leigh Leopards
• Leigh Miners Welfare
• Lock Lane
• London Broncos
• Mayfield
• Milford Amateurs
• Millom
• Myson
• NDLB
• Nottingham City
• Oldham
• Ovenden
• Park Amateurs
• Pia Donkeys
• Pilkington Recreation
• Prescot Panthers
• Queens
• Rochdale Hornets
• St Esteve
• Saddleworth Rangers
• Salford Red Devils
• Scarborough Pirates
• Sheffield Eagles
• Southend Invicta
• Swinton Lions
• Thames Board Mills
• Thatto Heath Crusaders
• Wakefield Trinity
• West Bowling
• West Hull
• Whitehaven RLFC
• Widnes Vikings
• Wigan St Patricks
• Woolston Rovers
• Workington Town
• York Knights