Eligible applicants from the Co-operative Championship, based on the first criterion, were: Halifax, Barrow Raiders, Featherstone Rovers, Widnes Vikings and Batley Bulldogs.
Along with Fred Webster and Eric Harris, Turnbull was one of only three players to have scored six or more tries in a game for the club, achieving a double hat-trick against Batley on Monday 28 December 1953.
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He led the Lions to five wins from five and players such as Tom Spencer (Wigan Warriors), Daniel Rooney (Workington Town) and Alex Walmsley (Batley Bulldogs) have since graced the professional ranks.