Coal mining in the United Kingdom

Annual UK coal production (in red) and imports (black), DECC data.

Coal mining employment in the UK, 1880-2012 (DECC data)

Coal production increased dramatically in the 19th century as the Industrial Revolution gathered pace, as a fuel for steam engines such as the Newcomen engine, and later, the Watt steam engine. To produce firewood in the 1860s equivalent in energy terms to domestic consumption of coal would have required 25 million acres of land per year, nearly the entire farmland area of England (26 m. acres).[16]

A key development was the invention at Coalbrookdale in the early 18th century of coke which could be used to make pig iron in the blast furnace. The development of the steam locomotive by Trevithick early in the 19th century gave added impetus, and coal consumption grew rapidly as the railway network expanded through the Victorian period. Coal was widely used for domestic heating owing to its low cost and widespread availability. The manufacture of coke also provided coal gas, which could be used for heating and lighting. Most of the workers were children and men.[17]

Aberaman Miners' Training Centre S.Wales 1951

UK coal production peaked in 1913 at 287 million tonnes.[4] Until the late 1960s, coal was the main source of energy produced in the UK, peaking at 228 million tonnes in 1952. Ninety-five per cent of this came from roughly 1,334 deep-mines that were operational at the time, with the rest from around 92 surface mines.[18]

In the 1950s and 1960s, around a hundred North East coal mines were closed.[19] In March 1968, the last pit in the Black Country closed and pit closures were a regular occurrence in many other areas.[20] Beginning with wildcat action in 1969, the National Union of Mineworkers became increasingly militant, and was successful in gaining increased wages in their strikes in 1972 and 1974.[21] Closures were less common in the 1970s, and new investments were made in sites such as the Selby Coalfield. In early 1984, the Conservative government of Margaret Thatcher announced plans to close 20 coal pits which led to the year-long miners' strike which ended in March 1985. The strike was unsuccessful in stopping the closures and led to an end to the closed shop in British Coal, as the breakaway Union of Democratic Mineworkers was formed by miners who objected to the NUM's handling of the strike.[22] Numerous pit closures followed, and in August 1989 coal mining ended in the Kent coalfield.[23]

In 1986, Kellingley colliery near Pontefract achieved a record 404,000 tonnes in a single shift but nevertheless, since 1981 production fell sharply from 128 to 17.8 million tonnes in 2009.

Between 1947 and 1994, some 950 mines were closed by UK governments. Clement Attlee’s Labour government closed 101 pits between 1947 and 1951; Macmillan (Conservative) closed 246 pits between 1957 and 1963; Wilson (Labour) closed 253 in his two terms in office between 1964 and 1977; Heath (Conservative) closed 26 between 1970 and 1974; and Thatcher (Conservative) closed 115 between 1979 and 1990.[24]

In 1994, then-Prime Minister John Major privatised British Coal after announcing 55 [25] further closures, with the majority of operations transferred to the new company UK Coal.[26][27] By this time British Coal had closed all but the most economical of coal pits.[28]

The pit closures caused coal production to slump to the lowest rate in more than a century, further declining towards the end of the 1980s and into the 1990s. This coincided with initiatives for cleaner energy generation as power stations switched to gas and biomass. A total of 100 million tons was produced in 1986, but by 1995 the amount was around 50 million tons.[29] The last deep mine in South Wales closed when the coal was exhausted in January 2008. The mine was closed by British Coal in the privatisation of the industry fourteen years earlier and re-opened after being bought by the miners who had worked at the pit.[30]

Following the limitations to the National Union of Mineworkers' power, British coal-dependent industries have turned to cheaper imported coal.[31] In 2001, production was exceeded by imports for the first time. In 2014, coal imported was three times more than the coal mined in Britain, despite large resources in the country.[32] In 2009, companies were licensed to extract 125 million tonnes of coal in operating underground mines and 42 million tonnes at opencast locations.[4]

Coal mining employed 4,000 workers at 30 locations in 2013, extracting 13 million tonnes of coal.[32] The UK Coal mines achieved the most economical coal production in Europe, according to UK Coal, with a level of productivity of 3,200 tonnes per man year as of 2012, at which point there were 13 UK Coal deep mines.[28] The three deep-pit mines were Hatfield and Kellingley Collieries in Yorkshire and Thoresby in Nottinghamshire.[1] There were 26 opencast sites in 2014, mainly in Scotland.[5] Most coal is used for electricity generation and steel-making, with its use for heating homes decreased because of pollution concerns. The commodity is also used for fertilisers, chemicals, plastics, medicines and road surfaces. Hatfield Colliery closed in June 2015, as did Thoresby, and in December 2015, Kellingley, bringing to an end deep coal mining in the UK. The occasion was marked by a rally and march attended by thousands of people.[33]

The demand for coal is likely to fall with increasing focus on renewable energy or low-carbon sources and loss of industry due to globalisation. Oil and gas reserves are predicted to run out long before coal,[34] so gas could be produced from coal by gasification.[35]

On 21 April 2017, Britain went a full day without using coal power to generate electricity for the first time since the Industrial Revolution, according to the National Grid.[36] In May 2019, Britain went a full week without coal power.[37] Later in the year a new record of 18 days, 6 hours and 10 minutes was set.[38] In 2019, German utilities firm RWE announced that it planned to close all its UK coal power plants by 2020, leaving only four plants operating by March 2020;[39] in 2018, eight were still in operation when the government announced plans to shut down all coal power plants in the UK by 2025.[40]