The document discusses key facts about Britain and its constituent countries. It defines the difference between the United Kingdom and Great Britain, noting that Great Britain does not include Northern Ireland. It provides population statistics for Britain and its individual countries. It also notes that in addition to English, Welsh, Gaelic, and Gaelic are spoken in Wales, Ireland, and Scotland. The most widely practiced religion is Christianity, and the Commonwealth refers to countries that were formerly part of the British Empire. Wealth levels vary, with London and the South East being the wealthiest parts of the UK.