Elite Motorsport's Ary Bansal put one hand on the GB4 Championship title, with victory in the penultimate race of the year at Donington Park.
The Indian driver started fourth, but quickly worked his way to the front of the pack, and claimed his fourth win of the year by over two seconds from Fortec's Thomas Ingram Hill, while KMR's Alex O'Grady shot from sixth on the grid to third.
Elite Motorsport's Isaac Phelps kept his championship chances alive by climbing from 12th to fourth, just ahead of Hillspeed's former championship leader Dan Guinchard, who battled from 11th to fifth.
He finished just ahead of Hillspeed teammate Leandro Juncos, while Arden's Leon Wilson went from 10th to seventh.
Elite's Alex Kattoulas is now eliminated from the title battle, but was eighth from 15th ahead of Douglas Motorsport duo Lucas Blakeley and Dayton Coulthard.
Combined with a significant change to the race two result after multiple penalties were issued for track limits violations, Bansal now holds a provisional eight point championship lead over teammate Phelps heading into the final race this afternoon. Guinchard is 13 points behind Bansal, with the top-three drivers the only contenders who can now claim the title.
GB4 Championship, partnered by the BRDC, Donington Park GT, provisional race three result:
1. Ary Bansal, Elite Motorsport
2. Thomas Ingram Hill, Fortec Motorsport, +2.482s
3. Alex O'Grady, KMR Sport, +4.351s
4. Isaac Phelps, Elite Motorsport, +4.762s
5. Dan Guinchard, Hillspeed, +6.878s
6. Leandro Juncos, Hillspeed, +8.382s
7. Leon Wilson, Arden Motorsport, +8.938s
8. Alex Kattoulas, Elite Motorsport, +9.778s
9. Lucas Blakeley, Douglas Motorsport, +10.618s
10. Dayton Coulthard, Douglas Motorsport, +11.023s
11. Lewis Wherrell, KMR Sport, +12.707s
12. Stefan Bostandjiev, Pace Performance, +15.205s
13. Luca Magnussen, Fortec Motorsport, +15.488s
14. Jason Pribyl, ADM, 15.802s
15. Dudley Ruddock, Arden Motorsport, +21.194s
16. Jack Taylor, Fortec Motorsport, +22.061s
17. Holly Miall, Fox Motorsport, +22.678s
18. Caitlyn McDaniel, Fox Motorsport, +29.040s
19. Flame Airikkala, Hillspeed, +31.195s
20. Lily-May Watkins, KMR Sport, +34.916s
21. Josh McLean, Pace Performance, +43.516s
22. Ava Dobson, Arden Motorsport, +1m24.905s
23. John O'Donnell, Pace Performance, +1 lap
24. Enzo Hallman, Douglas Motorsport, +1 lap