The UK has a railway network of 10,072 miles (16,209 km) in Great Britain and 189 miles (304 km) in Northern Ireland. Railways in Northern Ireland are operated by NI Railways, a subsidiary of state-owned Translink. In Great Britain, the British Rail network was privatised between 1994 and 1997, which was followed by a rapid rise in passenger numbers following years of decline, although the factors behind this are disputed. The UK was ranked eighth among national European rail systems in the 2017 European Railway Performance Index assessing intensity of use, quality of service and safety. Network Rail owns and manages most of the fixed assets (tracks, signals etc.). Around twenty, mostly privately owned, train operating companies operate passenger trains. In 2015, 1.68 billion passengers were carried. There are about 1,000 freight trains in daily operation. HS2, a new high-speed railway line, is estimated to cost £56 billion. Crossrail, under construction in London, is Europe's largest construction project with a £15 billion projected cost.
Major scientific discoveries from the 18th century include hydrogen by Henry Cavendish; from the 20th century penicillin by Alexander Fleming, and the structure of DNA, by Francis Crick and others. Famous British engineers and inventors of the Industrial Revolution include James Watt, George Stephenson, Richard Arkwright, Robert Stephenson and Isambard Kingdom Brunel. Other major engineering projects and applications by people from the UK include the steam locomotive, developed by Richard Trevithick and Andrew Vivian; from the 19th century the electric motor by Michael Faraday, the first computer designed by Charles Babbage, the first commercial electrical telegraph by William Fothergill Cooke and Charles Wheatstone, the incandescent light bulb by Joseph Swan, and the first practical telephone, patented by Alexander Graham Bell; and in the 20th century the world's first working television system by John Logie Baird and others, the jet engine by Frank Whittle, the basis of the modern computer by Alan Turing, and the World Wide Web by Tim Berners-Lee.
More InfoThe UK was the third country to develop a nuclear weapons arsenal (with its first atomic bomb test in 1952), but the new post-war limits of Britain's international role were illustrated by the Suez Crisis of 1956. The international spread of the English language ensured the continuing international influence of its literature and culture. As a result of a shortage of workers in the 1950s, the government encouraged immigration from Commonwealth countries. In the following decades, the UK became a more multi-ethnic society than before. Despite rising living standards in the late 1950s and 1960s, the UK's economic performance was less successful than many of its main competitors such as France, West Germany and Japan.
More InfoThe UK service sector makes up around 79 per cent of GDP. London is one of the three "command centres" of the global economy (alongside New York City and Tokyo), it is the world's largest financial centre alongside New York, and it has the largest city GDP in Europe. Tourism is very important to the British economy; with over 27 million tourists arriving in 2004, the United Kingdom is ranked as the sixth major tourist destination in the world and London has the most international visitors of any city in the world. The creative industries accounted for 7 per cent GVA in 2005 and grew at an average of 6 per cent per annum between 1997 and 2005.
More InfoAfter the end of the Second World War in 1945, the UK was one of the Big Four powers (along with the U.S., the Soviet Union, and China) who met to plan the post-war world; it was an original signatory to the Declaration of the United Nations. The UK became one of the five permanent members of the United Nations Security Council and worked closely with the United States to establish the IMF, World Bank and NATO. The war left the UK severely weakened, but it was spared the total war that devastated eastern Europe, and it depended financially on the Marshall Plan. In the immediate post-war years, the Labour government initiated a radical programme of reforms, which had a significant effect on British society in the following decades. Major industries and public utilities were nationalised, a welfare state was established, and a comprehensive, publicly funded healthcare system, the National Health Service, was created. The rise of nationalism in the colonies coincided with Britain's now much-diminished economic position, so that a policy of decolonisation was unavoidable. Independence was granted to India and Pakistan in 1947. Over the next three decades, most colonies of the British Empire gained their independence, with all those that sought independence supported by the UK, during both the transition period and afterwards. Many became members of the Commonwealth of Nations.
More InfoNonetheless, "Britain was a very wealthy country, formidable in arms, ruthless in pursuit of its interests and sitting at the heart of a global production system." After Nazi Germany invaded Poland, Britain entered the Second World War by declaring war on Germany in 1939. Winston Churchill became prime minister and head of a coalition government in 1940. Despite the defeat of its European allies in the first year of the war, Britain and its Empire continued the fight alone against Germany. Churchill engaged industry, scientists and engineers to advise and support the government and the military in the prosecution of the war effort. He formed a Special Relationship with the United States, and won their agreement to a Europe first grand strategy for the Allies. In 1940, the Royal Air Force defeated the German Luftwaffe in a struggle for control of the skies in the Battle of Britain. Urban areas suffered heavy bombing during the Blitz. There were eventual hard-fought victories in the Battle of the Atlantic, the North Africa campaign and the Italian campaign. British forces played an important role in the Normandy landings of 1944 and the liberation of Europe, achieved with its allies the United States, the Soviet Union and other Allied countries. The British Army led the Burma campaign against Japan and the British Pacific Fleet fought Japan at sea. British scientists contributed to the Manhattan Project which led to the surrender of Japan.
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