Ospreys win with a game to spare

The League loses a team with the demise of Welsh Region the Celtic Warriors. To correct the imbalance the remaining eleven teams will each have two weeks off during the league season beginning on 3 September 2004.

The Ospreys win the league title on 26 March 2005 when they beat Edinburgh 29-12 at the Gnoll with a match to spare.

The top eight sides in the league table at the end of the campaign qualify to play in the quarter-finals of the now end of season Celtic Cup, which is eventually won by Munster with a 27-16 victory over Llanelli Scarlets at Lansdowne Road on 14 May 2005.