The British Supersport Championship National Superstock 1000 & 600 and the British Motostar Championship are the four main championship series that are run as support races alongside the British Superbike Championship. In 2012 the Motostar category replaced the defunct 125cc category that had been running since the start of the British Superbike Championship in 1988 Motostar was open to both 125 and 250 machines similar to Moto 3 machines.
current season
2012 British Motostar Championship season, 2012 British Supersport Championship season, 2012 National Superstock 1000 Championship season, 2012 National Superstock 600 Championship season