Sam Laffins won a dramatic penultimate National Junior Superstock race as Owen Jenner stretched his points lead.
Laffins hit the front at the end of lap one when leader, and former points leader Aaron Silvester, highsided coming out of clearways, the first of a number of riders to be caught out on the drying track.
The G&S Racing rider controlled the race all the way to the flag as several riders crashed out, eventually beating Cameron Dawson by 5.508secs with Asher Durham third.
Owen Jenner – who started 12th – crossed the line fourth ahead of Edmund Best, boosting his points lead to 23 over Dawson with just one more race to go.
Pirelli National Junior Superstock with Santander Consumer Finance, Race One result:
1. Sam Laffins (G&S Racing)
2. Cameron Dawson (MSS Performance) +5.508s
3. Asher Durham (G&S Racing) +11.228s
4. Owen Jenner (Jenner Racing) +11.271s
5. Edmund Best (Symcirrus Motorsport) +13.721s