United KingdomThe United Kingdomof Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a sovereign state in Europe. The name United Kingdom refers to the union of what were once four separate countries: England Scotland Wales Ireland (though most of Ireland is now independent).Londonis the capital and most populous city of England, Great Britain, and the United Kingdom.Englandis a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west. The capital isLondon.Scotlandis a country that is part of the United Kingdom and covers the northern third of the island of Great Britain. The capital isEdinburgh.Walesis a country that is part of the United Kingdom. Located on the island of Great Britain, it is bordered by England to the east, the Irish Sea to the north and west, and the Bristol Channel to the south. ´ The capital isCardiff.Northern Irelandis a constituent unit of the United Kingdom of Great Britain and Northern Ireland in the northeast of the island of Ireland. The capital isBelfast.Lough Neagh, is a freshwater lake in Northern Ireland. The largest lake by area in the British IslesThe River Severnis the longest river in the United Kingdom, at about 220 miles (354 km)The River Thamesis a river that flows through southern England. It is the longest river entirely in England and the second longest in the United Kingdom, after the River Severn.The River Clydeis a river in Scotland.