nited Kingdom is a constitutional monarchy; climate in the UK is generally mild and temperate; the humid and mild climate of Great Britain is good for plants and flowers; population density of the United Kingdom is one of the highest in the world; most of the British are descendants of Celts, Romans, Angles, Saxons, Jutes, Danes and Normans; English is the official language; Britain has much rainfall, rivers and lakes; England is the largest, most populace, and wealthiest division of the United Kingdom; London is the largest city in Britain; coal is the most valuable mineral resource of Wales; Scotland is an administrative division of the Kingdom; Northern Ireland is an integral part of the United Kingdom.