Conwy and Carmarthenshire have proportionally more small areas in sub-cluster 1-1 (each with approximately one third of their small areas in this sub-cluster) than other Local Authorities.
Conwy a Sir Gaerfyrddin sydd â’r gyfran fwyaf o ardaloedd bach yn is-glwstwr 1-1 (mae tua thraean o ardaloedd bach y naill a’r llall yn yr is-glwstwr hwn) o gymharu â’r Awdurdodau Lleol eraill.