more people are expected to move to the Brecon Beacons than leave the area; for the Pembrokeshire Coast and Snowdonia more people are expected to leave the area than move in.
disgwyl i fwy o bobl symud i mewn i ardal Bannau Brycheiniog na gadael; o Arfordir Sir Benfro ac Eryri, mae disgwyl i fwy o bobl adael yr ardal na symud i mewn iddi.