Voisin held a 13-point advantage over fellow 2023 Aston Martin Autosport BRDC Young Driver Award finalist Joseph Loake coming into the weekend, with Hitech GP’s Alex Dunne just a further four points behind.
After securing a double pole in qualifying, Voisin converted the first of those into his second victory of the season in Saturday’s damp opening contest ahead of Matthew Rees, while Dunne finished third.
Voisin led again in a dry race two on Sunday morning but Dunne pounced on a mistake into Melbourne hairpin to snatch the lead from his rival into Goddards before taking his fifth victory of the season.
That left Dunne needing to overhaul a 22-point deficit in the deciding reversed-grid race, while Loake’s title hopes were ended after finishing eighth.
Dunne started two places ahead of Voisin from 20th in the finale, and the pair climbed up the order to 11th and 12th respectively before a mid-race safety car period.
Racing resumed for one more lap before a spin for Loake neutralised the proceedings again, with Dunne having made up two further positions. Racing did not resume, with Hillspeed's Gerrard Xie taking a maiden win behind the safety car, while 12th was enough for Voisin to clinch the crown.
Source: Autosport