Which passing the cliffs of Barry Island the coastline becomes a low - lying promontory called the Lays .
Which continues west taking in the villages of Rhoose and Aberthaw before reaching Breaksea Point , the most southerly point of mainland Wales .
Passing the cliffs of Barry Island the coastline becomes a low - lying promontory called the Lays , which continues west taking in the villages of Rhoose and Aberthaw before reaching Breaksea Point , the most southerly point of mainland Wales .