Kellingley Colliery, known affectionately as the 'Big K', was a deep coal mine in North Yorkshire, England, 3.6 miles (5.8 km) east of Ferrybridge power station. It was owned and operated by UK Coal.

UK Coal Production Ltd, formerly UK Coal plc, was the largest coal mining business in the United Kingdom. The company was based in Harworth, in Nottinghamshire. The company was a constituent of the FTSE 250 Index. The successor company that contains the former property division, Harworth Group, is still listed on the London Stock Exchange.