The 2021 F4 British Championship was a multi-event, Formula 4 open-wheel single seater motor racing championship held across United Kingdom. The championship featured a mix of professional motor racing teams and privately funded drivers, competing in Formula 4 cars that conformed to the technical regulations for the championship. This, the seventh season, following on from the British Formula Ford Championship, was the seventh year that the cars conformed to the FIA's Formula 4 regulations.[1] Part of the TOCA tour, it formed part of the extensive program of support categories built up around the BTCC centrepiece.
The season commenced on 8 May at Thruxton Circuit and concluded on 24 October at Brands Hatch, utilising the Grand Prix circuit, after thirty races held at ten meetings, all in the support of the 2021 British Touring Car Championship.
From this season forward, the grid for race 2 is a full reverse grid based on the results of qualifying, instead of reversing the top half drivers from race 1.[2]
This was the last season of the championship using the combination of Mygale M14-F4 chassis and the engines supplied by Ford.[3]