Rhuddlan, Ceredigion  Rhuddlan, Ceredigion is a small village in the community of Llanwenog, Ceredigion, Wales, which is 59.5 miles (95.8 km) from Cardiff and 178.2 miles (286.7 km) from London. Rhuddlan is represented in the National Assembly for Wales by Elin Jones (Plaid Cymru) and the Member of Parliament is Mark Williams (Liberal Democrats).