Michael Rutter exercised his reputation as a superb wet weather racer once again as he took victory in an interrupted first race of the day at Silverstone.
The Ridersmotorcycles.com Ducati rider made the most of the tricky weather conditions, which necessitated a red flag five laps into the first start, to snatch the lead from Josh Brookes with just two laps remaining.
His second win of the season after succeeding in similar conditions at Knockhill, Rutter was third for much of the race behind early leader Michael Laverty and Brookes, but after following the Australian past Laverty on lap seven, he duly made his own pass for the win one lap later.
Although it took a slight error by Brookes for Rutter to get a run on him, the British Superbike veteran would keep his Honda rival at bay to the chequered flag to keep his slim title hopes alive.
A difficult race for the riders as their wet weather tyres began breaking up on the dry line towards the end of the race, Brookes and Laverty completed the podium to improve their championship hopes.
Indeed, series leader Hill was the big loser from the race as he visibly struggled for rear-end grip on the Worx Crescent Suzuki. He would eventually cross the line in eighth place, a result that means Laverty has reduced his advantage to eight points, while Brookes is in contention 16 points behind.
The race restart would prove beneficial for more riders than others, not least James Ellison, who scythed his way up the order to finish fourth having been circulating at the bottom end of the top ten during the first phase. By contrast, his team-mate Stuart Easton struggled outside the points.
Ryuichi Kiyonari completed the top five, ahead of Alastair Seeley, who was another one to revel in the wet conditions having been running outside the points in the dry.
Simon Andrews passed Hill on the final lap for seventh, while Chris Walker and Dan Linfoot completed the top ten. Loris Baz struggled on his first outing in the wet on the Motorpoint Yamaha, the Frenchman finishing in 11th.