Yardley kept his championship hopes alive with a well-driven run to third, harrying second-placed Michael Scott throughout the race. Yardley set a new track lap record for the category, a 1:36.256.
Fourth after battling with Connor Adam for much of the race was Jacob Smith, who then held out Brody McConkey to make sure of valuable points for the championship.
Mike Lightfoot spun after his car and Jack Milligan's CareVets TR 86 made contact; Milligan receiving a drive-through penalty for his part in the clash. Lightfoot trailed the field by half a lap and clawed his way back in touch but finished last.
Matt Lockwood has struggled for pace this weekend after crashing yesterday. He had to switch to the LightingPlus TR 86 when his Placemakers car was too badly damaged to repair overnight, and found the car's handling very different from his own.
John Penny was off the pace after his strong showing at the previous round, and eventually finished eleventh after battling with Matt Lockwood.