Ava Dobson, who was the highest-placed female driver in last year's GB4 Championship, will represent American Express in this year's F1 Academy.

Fox Motorsport has confirmed Saudi karting champion Jasser Iskander as the team’s first driver for the 2026 GB4 Championship season. The youngster will be GB4's first-ever Saudi Arabian contender, and is the 20th confirmed driver on this year's grid, with just under three months still remaining until the start of the season.

Reigning five-time Ginetta Junior champions R Racing will expand into single-seaters for the first time in 2026, with a two-car entry into the GB4 Championship.

British racer Holly Miall will make the switch to multiple champions KMR Sport for her GB4 Championship return in 2026.

Fortec Motorsports has confirmed that young American racer Jordyn Martin will join the team for the 2026 season as she makes her debut in the GB4 Championship.