British Touring Car Championship leader Colin Turkington has received an eight-place grid penalty for the next round at Knockhill after a clash in race three at Snetterton.
The WSR BMW driver was battling Matt Neal for fourth in the reversed-grid finale when he hit the Honda Civic Tourer under braking for Montreal.
Turkington continued to finish an eventual third, while Neal could only recover to 11th.
The incident was investigated and Turkington was handed an eight-place grid penalty for the next round at Knockhill, along with three points on his license.
"When someone sits on the inside at the hairpins it's very tricky to pass so you have to look at forcing a mistake," Turkington told AUTOSPORT.
"He caught me by surprise at how early he stopped the car. I swerved to avoid him and tagged the rear. There was no malice involved."
The move is a blow for Turkington ahead of one of the BMW 125i M Sport's best rounds. He took two wins at Knockhill in 2013.
Turkington's team-mate Rob Collard will have to start from the back at the Scottish round after overtaking under yellow flag conditions in race two.
It was his third offence of the season, resulting in the grid penalty and three points being deducted from his championship score.
MG driver Sam Tordoff (incident with Collard) and AmD Ford Focus driver Dave Newsham (incident with Glynn Geddie) have also been given penalty points on their licenses for clashes in race two.