Bruce Winfield took his first win of the year in the first race of the day at Castle Combe, as race-long leader Adam Shepherd was robbed of his first victory on the last lap.
The race began with a bang as polesitter Chris Smiley started to move slightly before the lights and then stalled the car, causing the field behind to take evasive action as the Restart Racing driver began to get underway, falling to last on the first lap.
Jac Constable was another driver to get underway slowly, however, the Safety Car was deployed after Jamie Tonks went into the barrier at Quarry corner.
Racing resumed on lap four with the order of Adam Shepherd leading in his Area Motorsport with Shepherd Motors run Hyundai i30 N TCR ahead of Bruce Winfield in his Area Motorsport CUPRA TCR, Brad Hutchison in his MPHR Audi RS3 LMS TCR, championship leader Isaac Smith and Jess Hawkins who made up six places before the Safety Car was sent out.
Max Hart was up to sixth place in his JamSport Racing Hyundai i30 N TCR, however, he would soon be pit bound for retirement with a broken driveshaft. Callum Newsham, Alex Ley, Chris Sumpton and Lewis Kent completed the top ten.
As Shepherd gapped Winfield out front, Smith would be in defence mode in his Race Car Consultants Volkswagen Golf GTi TCR as Hart attacked before retirement, allowing Smith to chase Hutchison for the remainder of the race.
With his poor start, Smiley was on a mission as he fought his way back through the field, making up eleven places during the race, including a textbook move on Jess Hawkins for fifth place late in the race.
Lapp eleven seemed to be the point where several cars retired including Hart, Ant Whorton-Eales in the JamSport Racing Subaru WRX Sti and Bradley Kent in his Essex and Kent Motorsport Hyundai i30 N TCR.
Shepherd was set for the win until on the last lap at the final corner, the Hyundai driver went wide, allowing Bruce Winfield to take his first won of the year with Shepherd being classified second ahead of Bradley Hutchison, who took his maiden podium finish.
Isaac Smith finished in fourth place ahead of Smiley with Jessica Hawkins completing the top six places. Callum Newsham held on for seventh place as Alex Ley was eighth ahead of Jac Constable who recovered to take ninth place ahead of Scott Sumpton.
Matthew Wilson in the JWB Motorsport CUPRA Leon Competición was eleventh, with Neil Trotter taking his maiden Goodyear Diamond trophy win ahead of Steve Gales, who has switched to driving a Volkswagen Golf GTi TCR run by MPHR for the rest of the year, were the classified finishers.
Lewis Kent (Hyundai), Max Hart (Hyundai), Ant Whorton-Eales (Subaru), Bradley Kent (Hyundai), Darelle Wilson (Vauxhall) and Jamie Tonks (CUPRA) did not finish the race.
Andy Wilmot was classified in eleventh place, however, due to a ride height failure, was disqualified from the race.
