The Local Authorities with proportionally more of their LSOAs in this sub-cluster include Rhondda Cynon Taf (48%), Blaenau Gwent (45%), and Merthyr Tydfil (44%).
Ymhlith yr awdurdodau lleol y mae mwy o’u ACEHIau yn perthyn i’r is-glwstwr hwn ar gyfartaledd mae Rhondda Cynon Taf (48%), Blaenau Gwent (45%), a Merthyr Tudful (44%).