Each authority had already done a variety of things to improve the situation, each ran their services differently, and the group contained a range of sizes and demographics.
Roedd pob awdurdod eisoes wedi gwneud amrywiaeth o bethau i wella’r sefyllfa, roedd pob un yn cynnal ei wasanaethau’n wahanol, ac roedd y grŵp yn amrywio o ran maint a demograffeg.