The 2025 GB4 Championship partnered by the BRDC is to be the fourth season of a motor racing championship for open wheel, formula racing cars in Britain. The 2025 season, which was organised by MotorSport Vision, will be run over seven triple-header rounds.
GB4 will act as a direct feeder series to higher open-wheel categories, including the existing GB3 Championship partnered by the BRDC. GB4 will run primarily on the same British GT race programme as GB3, and retain many of the same championship partners.
Points are awarded to the top 20 classified finishers in races one and two, with the third race awarding points to only the top 15. Race three, which has its grid formed by reversing the qualifying order, awards extra points for positions gained from the drivers' respective starting positions.