2009–10 Premiership Rugby

The was the 23rd season of the top flight English domestic rugby union competition and the fifth and final one to be sponsored by Guinness. The reigning champions entering the season were Leicester Tigers, who had claimed their eighth title after defeating London Irish in the 2009 final. Leeds Carnege had been promoted as champions from the 2008–09 National Division One at the first attempt.

2009–10 Premiership Rugby

The was the 23rd season of the top flight English domestic rugby union competition and the fifth and final one to be sponsored by Guinness. The reigning champions entering the season were Leicester Tigers, who had claimed their eighth title after defeating London Irish in the 2009 final. Leeds Carnege had been promoted as champions from the 2008–09 National Division One at the first attempt.