While Plato’s victory in the opener was the 96th of his career, it was his first of the season. Sutton’s race two win was his fifth of 2017 and a big boost to his championship bid.
BMW driver Colin Turkington also had a strong weekend, claiming third place in all three races at the Scottish track to move into the points lead.
Tom Ingram claimed his third victory of the season in his Toyota Avensis in the final race of the day.
Here’s how rounds 19, 20 and 21 of the BTCC unfolded.
Plato claimed the 50th pole position of his BTCC career with a late effort on slicks in a mixed-weather qualifying session, with team-mate Sutton lining up alongside him on the grid.
The double champion held the lead at the start, and then led home Sutton after an untroubled run. In fact, the only mistake made by either driver was a bungled attempt to give Sutton a bonus point by letting him lead a lap: they made the switch just after the official timing line, so it didn't count.
Plato reckoned his improvement in form was down to discovering a problem with the car’s differential, which he believes was the cause of his season-long struggles, after qualifying. “It was like a different car in this race,” he said.