Swedish contender Enzo Hallman will make the step up to GB4 in 2025, completing Douglas Motorsport’s three-car line-up for the new campaign. The 17-year-old from Jönköping enters GB4 off the back of a successful 2024 season, in which he was a front-runner in both single-seaters and junior touring cars.

Rising American racer Ava Dobson will contest the 2025 GB4 Championship with Arden Motorsport as she bids to kickstart her open-wheel racing career in Europe.

Karter Lily-May Watkins will make her single-seater debut in 2025, as she moves up to the GB4 Championship with three-time team champions KMR Sport. The 17-year-old from Hertfordshire began karting in 2019 at Rye House and initially competed in one-day junior race events, where she was a podium finisher.

Megan Bruce will return to GB4 in 2025, making the switch to three-time team champions KMR Sport for her second campaign in the championship. The 20-year-old proved herself as a dependable contender in her debut season, finishing every race and registering nine top-10 finishes in her first single-seater programme.

Dayton Coulthard is joining Douglas Motorsport as a driver for 2025, and will compete in the GB4 Championship.