Looks like an interesting documentary on BBC Two Wales at 7pm tomorrow evening.
"The Rugby Codebreakers": Broadcaster and journalist Carolyn Hitt investigates why so many men gave up their dreams of playing rugby union for Wales, seeking fame and fortune among the mills of Lancashire and Yorkshire by committing an act that was considered tantamount to treason - switching codes to play rugby league. Her journey explores the impact of class, race and economic change on the game at the heart of Welsh identity.
BBC Two Wales is on Sky Channel 971 (be careful with those numbers

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[urlhttps://www.bbc.co.uk/programmes/b09w01q4[/url