Shane Byrne opened up a 30-point lead in the British Superbike Championship after a double triumph at Knockhill on Sunday.

Sittingbourne rider Byrne won the opening race after a lively battle with title rival Josh Brookes.

The pair touched at one point as Byrne tried to grab the lead. He made another move on the next lap and pulled clear in the final three.

The Rapid Solicitors Kawasaki rider lined up for race two on the second row but a flying start saw him lead going into the first corner.

Australian Brookes started to cut the gap in the closing stages, but when he clipped a kerb on the final lap Byrne cruised home.

Byrne leads Brookes 166-136 at the top of the standings, with round five of the championship at Snetterton on July 7.