Quin or bust for ambitious Exiles

IRELAND’s Bob Casey will lead London Irish into battle against Harlequins warning that defeat would conclude a season of failure at the Madejski Stadium.

The capital rivals clash at Twickenham Stoop tonight in the second of the day’s Guinness Premiership semi-finals.

Director of rugby Toby Booth believes Irish have made clear progress since 2006 but admits they must get to the Twickenham showpiece on May 16 to continue their upward curve.