The 2004 season saw an expansion to fourteen teams with Birmingham Bulldogs, Carlisle Centurions and Essex Eels elected from the Rugby League Conference.

Three teams from the Conference North Premier (Leeds Akkies, Cottingham Phoenix and East Lancashire Lions) were entered.

A largely Naorthen based league saw far less resignations than its predecessor with only Cottingham Phoenix being expelled at the end of the 2007 season.

After winning the Yorkshire Premier title in 2009, Kippax Knights enter red the National Fivision in 2010 while Gateshead Storm resigned to merged with Newcastle Knights in the North East league and East Lancashire Lions taking a season’s sabbatical to secure a new home base (they resurfaced as Accrington & Leyland Lions in the North West Premier Division in 2011).

Despite finishing top of the league, Huddersfield Underbank Rangers were beaten 17-10 by Hemel Stags in the Grand Final.

Winners, Hemel Stags were elevated to the professional Championship 1,[4] while Coventry Bears, Huddersfield Underbank Rangers and Nottingham Outlaws were among nine clubs invited to join the new-look National Conference League.

[5] Nottingham Outlaws opted to join Conference League South along with Bristol Sonics and St Albans Centurions.

After not being invited to continue in the NCL, Bramley Buffaloes and Kippax Knights dropped into the Yorkshire Men's League.

[6] Warrington Wizards merged with Woolston Rovers and applied for the National Conference League while South Wales Hornets folded.