Anglesey the island. The highest six are Holyhead Mountain, ; Mynydd Bodafon, ; Mynydd Llaneilian, ; Mynydd y Garn, ; Bwrdd Arthur, ; and Mynydd Llwydiarth, . To the south and south-east the island is separated from the Welsh mainland by the Menai Strait, which at its narrowest point is about wide. In all other directions the island is surrounded by the Irish Sea. It is the 51st largest island in Europe, and just five square kilometres smaller than Singapore. There are several small towns scattered around the island, making it quite evenly populated. The largest are Holyhead, Llangefni, Benllech, Menai
Flag of Anglesey depicted in the east window of Llangadwaladr church on the island. According to the heraldic historian Wilfrid Scott-Giles, Anglesey County Council used the Hwfa arms informally before they were incorporated into the design granted to them officially. Between 1857 and 1950 the arms were used by Anglesey Constabulary. An association between the Hwfa arms and the island county of Anglesey is thus long established. Flag of Anglesey The Anglesey flag () is the flag of the County of Anglesey. It was registered by the Flag Institute in March 2014. The design is a banner of the arms ascribed by later