Gwynedd Wales Anglesey Church Island Ynys Fydlyn Holy Island (Anglesey) Anglesey Church Cribinau South Stack Llanddwyn Island Gwynedd Bardsey Walk to Cei Ballast Ynys Gifftan Ceridigion Ynys Lochtyn Pembrokeshire Caldey Gateholm Grassholm Ramsey St Catherine’s Skokholm Skomer Island Vale of Glamorgan Flatholm Sully Gower Worm's Head Middle Head Mumbles Head Bardsey Walk to Cei Ballast Ynys Gifftan