The Devils Bridge hotel in the first episode is actually called The Hafod hotel. Built originally as a hunting lodge in the 1700's. It is a very popular hotel during peak season.
Filmed in and around Aberystwyth. Helen Jenkins and Byron Rodgers houses are in Borth a seaside town around 5 miles north of Aberystwyth whereas Devils Bridge is around 10 miles east of Aberystwyth.
The Cambrian police does not exist the county of Ceredigion comes under Dyfed-Powys constabulary one of the largest geographical constabularies in the UK with one of the smallest population. It is mainly rural areas which encompasses the Cambrian mountains and the Brecon Beacons. It does police many towns and the UK smallest city, Saint Davids.
Actors Richard Harrington, Aneirin Hughes & Sara Lloyd Gregory all starred in "Under Milk Wood" "Alys" and "Y Pris"