Chef (Daytime) Base: Llys y Fran Reservoir, Pembrokeshire (SA63 4RR) Closing Date: 23:59 on 05 October 2025 Who we are Dwr Cymru Welsh Water keep 3 million people healthy each day with safe, reliable water, and take away wastewater to clean, before returning it safely to our beautiful rivers and seas. Llys y Fran is our largest reservoir in Pembrokeshire residing in the foothills of the Preseli Mountains.