sixth major tourist destination in the world. The creative industries accounted for 5.9% of the UK's GVA in 2019, having grown by 43.6% in real terms from 2010. Creative industries contributed more than £111bn to the UK economy in 2018, growth in the sector is more than five times larger than growth across the UK economy as a whole as reported in 2018. WPP plc, the world's biggest advertising company, is also based in the UK. Following the United Kingdom's withdrawal from the European Union, the functioning of the UK internal economic market is enshrined by the United Kingdom Internal Market Act 2020 which ensures trade in goods and services continues without internal barriers across the four countries of the United Kingdom. The Industrial Revolution started in Britain with an initial concentration on the textile industry, followed by other heavy industries such as shipbuilding, coal mining and steelmaking. British merchants, shippers and bankers developed overwhelming advantage over those of other nations allowing the UK to dominate international trade in the 19th century. As other nations industrialised, coupled with economic decline after two world wars, the United Kingdom began to lose its competitive advantage and heavy industry declined, by degrees, throughout the 20th century. Manufacturing remains a significant part of the economy but accounted for only 16.7 per cent of national output in 2003. The automotive industry employs around 800,000 people, with a turnover in 2015 of £70 billion, generating £34.6 billion of exports (11.8 per cent of the UK's total export goods). In 2015, the UK produced around 1.6 million passenger vehicles and 94,500 commercial vehicles including luxury cars such as Rolls-Royce, Bentley and Range Rover. The UK is a major centre for engine manufacturing: in 2015 around 2.4 million engines were produced. The UK motorsport industry employs more than 40,000 people, comprises around 4,300 companies and has an annual turnover of around £10 billion. 7 of the 10 Formula One teams are based in the UK, with their technology being used in supercars and hypercars from McLaren, Aston Martin and Lotus. The aerospace industry of the UK is the second- or third-largest national aerospace industry in the world depending upon the method of measurement and has an annual turnover of around £30 billion. BAE Systems plays a critical role in some of the world's biggest defence aerospace projects. In the UK, the company makes large sections of the Typhoon