The 2021 British Champions Series, sponsored by QIPCO, was the 11th edition of the horse racing series comprising 35 of the UK's top flat races.
The series began with the 2,000 Guineas at Newmarket on 1 May, and ended on British Champions Day at Ascot on 16 October.
The series was split into five categories: Sprint, Mile, Middle Distance, Long Distance and Fillies & Mares. Each category included seven races.