Max Cook continued his winning ways as he powered to his third of the year at Donington Park, beating Dan Brooks by almost four seconds.
Jack Bednarek was third, almost half a second adrift of Brooks as Franco Bourne took fourth ahead of Sam Laffins.
Pirelli National Junior Superstock Championship with MotoNovo Finance, Donington Park:
1. Max Cook, Uggly & Co by Binch Pro
2. Dan Brooks, R4R Vision Team +3.944s
3. Jack Bednarek, CF Motorsport +4.418s
4. Franco Bourne, Marvel HCL Motorsport +4.900
5. Sam Laffins, Cheshire Mouldings Kawasaki by JR Performance +5.487s