Cymru, WalesWales is a part of the United Kingdom of Great Britain and Ireland until 1922; part of the United Kingdom of Great Britain and Northern Ireland 1922 => Anglesey (Ynys Môn) is an island off the north-west coast of Wales. It forms a principal area known as the Isle of Anglesey, that includes Holy Island across the narrow Cymyran Strait and some islets and skerries.