Inside the swap deal – how Warrington and Hull KR swapped Robbie Mulhern and Luis Johnson

Swap deals are a rare commodity in rugby league. There are a variety of reasons why, mainly because it can complicate matters, particularly when clubs are working under quota and salary cap restrictions. Then there's the challenge of appeasing both players, both agents and both clubs. It can be a messy business. But in December Warrington Wol