Third place came back to Wilkins and Scott four laps from the end when the Chad Ferrari struck a problem; Balbiani nursed the car home fourth, about 20 seconds ahead of the Jones brothers' Preci-Spark Ascari.
Alan Simonsen and Hector Lester finished in sixth, a lap in arrears, with the only other classified GT3 finisher the Mosler, which covered only 58 of the 81 laps because of engine problems. The VRS Ferrari of Adam Wilcox and Phil Burton was the only machine not classified: its engine expired after 16 laps.
There was another fine GT4 class win for Jody Firth and Nigel Moore - their eighth of the season - in the Team WFR Ginetta G50. Championship newcomer Century Motorsport led the way initially, courtesy 17-year-old Ben Hetherington, with Nathan Freke finishing the drive with a fastest lap-setting performance spoiled only by having to serve a drive-through penalty for a pit stop rules infringement.
The ABG Motorsport-prepared KTM X-BOW enjoyed a trouble-free run to eighth overall in the hands of Marcus Clutton and Phil Keen.