While the term may refer to anybody who drives for a living, it usually implies a driver of an elegant passenger vehicle such as a horse-drawn carriage, luxury sedan, motor coach, or especially a limousine; those who operate buses or non-passenger vehicles are generally referred to as "drivers". In some countries, particularly developing nations where a ready supply of labor ensures that even the middle classes can afford domestic staff and among the wealthy, the chauffeur may simply be called the "driver".
People currently sometimes employ chauffeurs full-time to drive themselves in their own personal vehicles, yet there are also professional services offering limousines or rental cars driven by chauffeurs. This is very similar to but much more luxurious than taking a taxicab. A variety of benefits are cited for using chauffeurs, including convenience, productivity and time savings, and driving safety for business people and seniors. Insurance costs for luxury vehicles are often lower if the designated driver is a chauffeur.
The legal requirements to be a chauffeur vary depending on the local jurisdiction and class of vehicle. In some cases, a simple permit is all that is required, but in others an additional professional license is needed with certain minimum standards in areas such as: age, health, driving experience, criminal record, local geographic knowledge, training attended.
London is the capital and largest city of England and the United Kingdom. It stands on the River Thames in south-east England at the head of a 50-mile (80 km) estuary down to the North Sea, and has been a major settlement for two millennia. The City of London, its ancient core and financial centre, was founded by the Romans as Londinium and retains boundaries close to its medieval ones.[note 1] Since the 19th century, "London" has also referred to the metropolis around this core, historically split between the counties of Middlesex, Essex, Surrey, Kent, and Hertfordshire, which largely comprises Greater London, governed by the Greater London Authority.[note 2] The City of Westminster, to the west of the City of London, has for centuries held the national government and parliament.
London, as one of the world's global cities, exerts strong influence on its arts, commerce, education, entertainment, fashion, finance, health care, media, tourism, and communications, and therefore has sometimes been called the capital of the world. Its GDP (€801.66 billion in 2017) makes it the biggest urban economy in Europe, and it is one of the major financial centres in the world. In 2019 it had the second-highest number of ultra high-net-worth individuals in Europe after Paris and the second-highest number of billionaires of any city in Europe after Moscow. With Europe's largest concentration of higher education institutions, it includes Imperial College London in natural and applied sciences, the London School of Economics in social sciences, and the comprehensive University College London. The city is home to the most 5-star hotels of any city in the world. In 2012, London became the first city to host three Summer Olympic Games.
London's diverse cultures mean over 300 languages are spoken. The mid-2018 population of Greater London of about 9 million made it Europe's third-most populous city. It accounts for 13.4 per cent of the UK population. Greater London Built-up Area is the fourth-most populous in Europe, after Istanbul, Moscow and Paris, with 9,787,426 inhabitants at the 2011 census. The London metropolitan area is the third-most populous in Europe after Istanbul's and Moscow's, with 14,040,163 inhabitants in 2016.[note 3]
London has four World Heritage Sites: the Tower of London; Kew Gardens; the combined Palace of Westminster, Westminster Abbey, and St Margaret's Church; and also the historic settlement in Greenwich, where the Royal Observatory, Greenwich defines the Prime Meridian (0° longitude) and Greenwich Mean Time. Other landmarks include Buckingham Palace, the London Eye, Piccadilly Circus, St Paul's Cathedral, Tower Bridge and Trafalgar Square. It has numerous museums, galleries, libraries and sporting venues, including the British Museum, National Gallery, Natural History Museum, Tate Modern, British Library and West End theatres. The London Underground is the oldest rapid transit system in the world.