The four-time champion progressed from third on the grid to second at the start, then took one lap after an early safety car to work a way around the reversed-grid polesitting Excelr8 Motorsport Hyundai i30 N of Tom Chilton.
Turkington had extended an enormous margin of 1.286 seconds within a lap of the pass, with Chilton soon conceding the runner-up spot to the second West Surrey Racing-run BMW 330e M Sport of Jake Hill.
