Colin Turkington made it two from two in the second race at Oulton Park, extending his championship lead with another dominant drive.
The 2009 British Touring Car Championship champion fought off fast-starting WSR team-mate Rob Collard into Old Hall for the first time, leading from lights-to-flag for his fourth win of the season.
The best start of all was made by the Audi of Rob Austin from fifth on the grid, charging through into third place before sustaining huge pressure from Jason Plato‘s MG.
Plato pulled alongside the Audi A4 heading into the first corner on the start of lap three, Austin grimly hanging on despite an increasing queue of cars beginning to form behind him.
In amongst that queue, Alain Menu made an optimistic move up the inside of fellow double BTCC champion Fabrizio Giovanardi at the Knickerbrook chicane, mounting the kerbs and spinning the Ford driver out of contention.
Menu was involved in a further battle with reigning champion Andrew Jordan that ended in the Pirtek Racing Honda Civic recovering from a sideways moment through Cascades, Jordan and his Swiss rival exchanging views after the race.
Jordan then made a move up the inside of Dave Newsham heading into Old Hall that allowed Jack Goff to pounce on the open door, but contact between the pair spat Newsham’s AmD Ford Focus into the barriers.
A safety car period followed, the race resuming with four laps remaining. Turkington and Collard instantly made the break at the head of the field once again, Turkington claiming a fourth win of the season as the Northern Irishman extended his championship lead.
Third place went to the determined Austin ahead of Plato, while Gordon Shedden completed the top five. However, a safety car infringement saw Collard and Austin switched after the race, Austin inheriting second place and denying a second WSR one-two of the day.
Sam Tordoff entered the final corner of the race in sixth, but crossed the line ninth after Mat Jackson dived inside the MG KX Clubcard Fuel Save BTCC Team driver.
Tom Ingram followed Jackson through for a personal best BTCC result of seventh in the Speedworks Toyota Avensis, Aron Smith also taking advantage as Tordoff and Menu rounded out the top 10.
Jordan ended the race 11th ahead of Matt Neal, while Nick Foster and Adam Morgan both suffered mechanical problems that dropped them out of contention.
The top eight cars will be reversed for the final race of the day at 16:57, putting Smith’s BMR Racing Volkswagen CC on pole position ahead of Ingram.