The recent completion of the ten-year programme of principal council electoral reviews resulted in better electoral arrangements for voters and councils across Wales.
Ar ôl cwblhau’r rhaglen deng mlynedd o adolygiadau etholiadol prif gynghorau yn ddiweddar, arweiniodd hyn at well trefniadau etholiadol ar gyfer pleidleiswyr a chynghorau ledled Cymru.