[1] After the abandonment of the previous season due to the COVID-19 pandemic,[2] the league's constitution remained largely unchanged, with the planned structural changes being put in place after this season.
The 2020–21 season started in September and was suspended on 21 December again as a result of the COVID-19 pandemic in England.
[5] The scheduled restructuring of non-league football took place at the end of the season to include a new division that was added to the Combined Counties at step 5 for 2021–22.
Promotions from steps 5 to 4 and 6 to 5 were based on points per game across all matches over the two abandoned seasons (2019–20 and 2020–21), while teams were promoted to step 6 on the basis of a subjective application process.
[6] The Premier Division was reduced from 21 to 20 clubs after Balham transferred to the Southern Counties East League as they moved to groundshare with AFC Croydon Athletic.