10 Dec, 12:23
Ireland's John Lacey will referee his first ever RBS 6 Nations match in February, while Alain Rolland is also included in the Elite Panel in what is his last season.
Commenting on the signing Director of Rugby Phil Davies said, " Colm is highly rated over in Ireland and several Zurich Premiership and French clubs were keen to sign him so I am pleased that he has agreed to join in the face of that competition. He is a rugged back rower and he will bring a real presence to our pack for next season."
Rigney becomes the 8th Irish based player to leave for foreign climes, following on from the news that Leinster Lions trio Andy Dunne, Simon Keogh and Ben Willis are all bound for Harlequins who had already secured the services of Gavin Duffy (Connacht).
Leeds Tykes have also signed Bristol's international wing/centre, Phil Christophers. The 22 year old has, like Rigney, signed a two year contract with the Yorkshire club..