Irwin replaced by Bridewell at top of BSB standings

Glenn Irwin lies second in the Britisg Superbike Championship standings

Glenn Irwin endured a frustrating weekend at Knockhill as he relinquished the lead of the British Superbikes Championship to Tommy Bridewell.

The PBM Ducati rider from Carrickfergus was forced to retire in the opener before finishing eighth and ninth in Sunday's two races.

Irwin moved up from 13th on the opening lap of the final race to earn a top-10 placing.

Reigning champion Tommy Bridewell won race one and sits 11 points clear at the top after coming third in race two and second in the finale.

Irwin lost out by just half a point to Bridewell in last year's championship.

Rory Skinner won race two in wet conditions and was followed in by Christian Iddon.

Iddion became the seventh different winner of the season with victory in race three - Danny Kent completed the podium.