Andrew Jordan took victory at Knockhill to reduce teammate Colin Turkington’s points lead to just four after a disaster for the sister BMW.
Jordan powered away from the front row to claim the lead from Rory Butcher, who had the less favourable medium tyre and full ballast as he slotted into the place.
While Jordan settled into his position, Butcher came under attack from Dan Cammish. By the end of lap six Cammish had taken second from Butcher at the hairpin.
Butcher was delayed in the move and this allowed Turkington’s BMW to push ahead of the Honda too by the time the pack had reached Duffus Dip at the start of lap seven.
Butcher tried to gain third place down the inside but made contact with the rear of BMW, which spun Turkington into the gravel, Turkington recovered to 19th, but was out of points.
Jordan continued to his sixth victory of the campaign, while Butcher took third place on the road under pressure from Senna Proctor.
Butcher’s podium finish will stand, but the driver was handed a five-place grid penalty for the final race of the weekend.
Meanwhile, Chilton was under pressure from Ingram’s Speedworks Motorsport Toyota to land fifth.
Jordan’s win and Turkington’s non-score means that the gap between the two at the head of the standings has gone from 30 to four points.
In the background, Mike Bushell’s