For example, Monmouthshire and Powys share a border with England whilst Monmouthshire also has a relatively high number of children attending independent schools.
Er enghraifft, mae Sir Fynwy a Phowys yn rhannu ffin â Lloegr ac mae gan Sir Fynwy hefyd nifer gymharol uchel o blant yn mynychu ysgolion annibynnol.