STM Sports were confirmed in the Ardal SW league by the FAW.
However, on 27 July 2020, they announced that they had folded, leaving only 15 sides in the South West league.
[2] Cardiff Draconians were announced as the replacement team to be admitted to the league on 3 August.
[3] Relegated from Cymru South From Welsh Football League Division One
Source: Ardal SW Ground Information On 28 July 2020, the Football Association of Wales announced that this league would be named Ardal SW and would be sponsored by Floodlighting and Electrical Services.