They thought that maintained schools would not be able to accommodate additional pupils, or that class sizes would increase and the standard of education provided would be affected.
Roeddent yn credu na fyddai ysgolion a gynhelir yn gallu darparu ar gyfer disgyblion ychwanegol, neu y byddai meintiau dosbarthiadau yn cynyddu ac y byddai effaith ar safon yr addysg a ddarperir.