
National Mapping Agency of the United Kingdom.

OL 12
Central and West Brecon Beacons

OL 13
Eastern Brecon Beacons

OL 12 Active
Central and West Brecon Beacons

OL 13 Active
Eastern Brecon Beacons
Since 1977
National Mapping Agency of the United Kingdom.
OL 12
Central and West Brecon Beacons
OL 13
Eastern Brecon Beacons
OL 12 Active
Central and West Brecon Beacons
OL 13 Active
Eastern Brecon Beacons