Lee Johnston held off Luke Stapleford to take the first Sprint race win of the year in a lights to flag victory.
From pole, the Ashcourt Racing rider took the lead at the start and was able to fend off numerous attempts to pass from his rival, to eventually take the win by 0.222secs.
Tom Booth-Amos, who has been a constant frontrunner all weekend so far, took third, beating Australia’s Tom Toparis as Jamie Perrin was fifth.
In the GP2 class, Joe Collier took the win as he crossed the line 12th overall. Second went to Cameron Fraser who finished 15th, just one spot ahead of Harry Rowlings.
Quattro Group British Supersport & British GP Cup, Sprint race results:
1. Lee Johnston (Ashcourt Racing)
2. Luke Stapleford (Profile Road & Racing Performance) +0.222s
3. Tom Booth-Amos (Gearlink Kawasaki) +0.770s
4. Tom Toparis (Macadam Racing) +5.367s
5. Jamie Perrin (Astro JJR Suzuki) +7.746s