Amanuel Brinton celebrated victory in the opening BTC race of the weekend, as he pipped Julian Correa by 0.081secs.
Correa had been the dominant force throughout practice and qualifying, but he was unable to hold off Brinton at the end of the 14-lap race and had to settle for second.
Lucas Brown celebrated the final podium spot, ahead of Ryan Frost, with Ronnie Harris fifth.
R&G British Talent Cup, Race One result:
1. Amanuel Brinton (Kovara Projects/RS Racing)
2. Julian Correa (Microlise Cresswell Racing) +0.081s
3. Lucas Brown (SENCAT Talent Team/Mortimer Racing) +0.307s
4. Ryan Frost (Fibre Tec Honda) +0.436s
5. Ronnie Harris (Kovara Projects/RS Racing) +1.297s