The defining moment of the race eventually came on lap eleven when Brookes's unorthodox line around Vale, where he runs deep into the entry, wide on the exit and tight around the ensuing long right-hander, paid dividends as he held out Hill long enough to slip underneath him.
Taking charge of the race, Brookes proceeded to open up a margin that no-one else had been capable of doing before, the order staying static until the red flag was dropped on the final lap due to Chris Walker's Pr1mo Kawasaki expiring on the home straight.
It meant Brookes was able to celebrate his second win of the year, while Hill clawed back some ground on third place Hopkins in the fight for the title, the pair split by eight points in Hopkins's favour with three races remaining.
Brookes's win moves him into third place, albeit 41 points behind Hopkins, while Laverty and Byrne, who finished fourth and fifth respectively, are tied on points in fourth and fifth.
Behind the top five, Kirkham and Hickman settled for sixth and seventh in a convincing display of frontline riding, the pair well ahead of eighth place Michael Rutter on the Rapid Bathams Ducati. Tommy Bridewell and Dan Linfoot completed the top ten, ahead of Graeme Gowland, Alex Lowes, Ryuichi Kiyonari, Gary Mason and Ian Lowry.
Meanwhile, two second place finishes means Glen Richards is the 2011 British Superbike EVO Champion, a result that also signals a first title for BSB debutants WFR Honda.