Among the opposing representations, 2 alternative pairings were proposed Bridgend with Rhondda and Ogmore and Vale of Glamorgan with Cardiff South and Penarth.
Ymhlith y cynrychiolaethau yn erbyn, cynigiwyd 2 bâr amgen, sef Pen-y-bont ar Ogwr â Rhondda ac Ogwr a Bro Morgannwg â De Caerdydd a Phenarth.