The F4 British Championship is a single-seater motorsport series based in the United Kingdom. The series is run to the FIA's Formula 4 regulations, and is administered by Motorsport UK. The championship is designed as a low-cost entrance to car racing, and is aimed at young racing drivers moving up from karting.

FIA Formula 4, also called FIA F4, is an open-wheel racing car category intended for junior drivers. There is no global championship, but rather individual nations or regions can host their own championships in compliance with a universal set of rules and specifications.