Rodin Carlin’s Callum Voisin extended his championship lead with his first triumph of the season in race two at Brands Hatch.
Voisin started from pole and resisted a first lap challenge from fellow front-row starter and nearest championship challenger Joseph Loake.
The British-Swiss contender then made a decent restart after a first lap incident between Shawn Rashid and Noah Ping, and built a lead of over a second mid-race, taking the flag 1.3s clear of Loake after 14 laps.
McKenzy Cresswell earned his fourth successive podium with third place, with Hitech Pulse-Eight's Alex Dunne finishing six tenths of a second behind in fourth.
JHR's Matthew Rees recovered from a grid penalty to claim fifth place ahead of a charging Jarrod Waberski, who powered his Fortec car to sixth from 14th on the grid.
Douglas Motorsport's Tymek Kucharczyk moved up to seventh from ninth on the grid, and ahead of Arden VRD's James Hedley, who ran third early on after a good start from fourth on the grid, only to lose the position after a trip into the Paddock Hill gravel while battling with Cresswell.
Hedley recovered by passing Chris Dittmann Racing's Zak Taylor, who finished ninth, ahead of JHR's David Morales.
Starting alongside each other on the front row, there was plenty at stake as Voisin looked to extend his championship lead for the second successive race, while Loake knew that a win would bring him to within a point of the summit.
Loake made a slightly better start to draw alongside Voisin on the run to Paddock Hill. The battle continued through Druids, with Loake around the outside at both corners.
That allowed Voisin to keep his advantage, but his first lap lead of six tenths of a second was wiped out by the sole safety car appearance.
Voisin's restart was perfect, creating an immediate gap of several car lengths, and crossing the line eight tenths clear. The margin got as high as 1.4 seconds, as the championship leader looked to stamp his authority.
He finished 1.3 seconds ahead, and extended his championship lead over Loake to 13 points.
The final GB3 race of the weekend is due to commence at 16.20.
GB3 Championship, partnered by the BRDC, Brands Hatch race two provisional result:
1. Callum Voisin, Rodin Carlin, 14 laps
2. Joseph Loake, JHR Developments, +1.338s
3. McKenzy Cresswell, Elite Motorsport, +4.189s
4. Alex Dunne, Hitech Pulse-Eight, +4.834s
5. Matthew Rees, JHR Developments, +5.755s
6. Jarrod Waberski, Fortec Motorsports, +16.225s
7. Tymek Kucharczyk, Douglas Motorsport, +18.138s.
8. James Hedley, Arden VRD, +18.367s
9. Zak Taylor, Chris Dittmann Racing, +19.617s
10. David Morales, JHR Developments, +20.583s
11. Max Esterson, Fortec Motorsports, +21.017s
12. Costa Toparis, Rodin Carlin, +21.369s
13. Nico Christodoulou, Arden VRD, +21.761s
14. Souta Arao, Hitech Pulse-Eight, +22.735s
15. Oliver Stewart, Elite Motorsport, +23.177s
16. John Bennett, Rodin Carlin, +21.369s
17. Michael Shin, Hitech Pulse-Eight, +22.735s
18. Lucas Staico, Douglas Motorsport, +23.908s
19. Daniel Mavlyutov, Hillspeed, +26.150s
20. Gerrard Xie, Hillspeed, +27.263s
21. Noah Ping, Arden VRD, +2 laps
DNF. Arthur Rogeon, Chris Dittmann Racing
DNF. Edward Pearson, Fortec Motorsport
DNF. Shawn Rashid, Douglas Motorsport