It formed part of the extensive program of support categories built up around the British Touring Car Championship centrepiece.
It was the fifteenth Ginetta Junior Championship, commencing on 8 May 2021 at Thruxton and concluding on 24 October 2021 at Brands Hatch, utilising the Grand Prix circuit, after ten meetings, all in support of the 2021 British Touring Car Championship.
[3] The first round of the championship saw the record broken for most entries in a Ginetta Junior event.
[6] Midseason Changes Round 10 at Oulton Park was postponed due to barrier damage sustained during a Mini Challenge UK race.
Due to timetable constraints the rescheduled race could not take place that weekend, so it was subsequently run at the following meeting at Knockhill.