Wistow Colliery, which was part of the Selby Coalfield, holds the UK record for coal mined in one week—200,743 tonnes in 1995. The 110 square mile (285 km²) Selby Complex, employing 3,000 miners plus contractors and ancillary staff, closed on Friday 14 May 2004 despite rising demand for coal in the UK. UK Coal, the pit's owner, said closure was due to rising costs caused by deteriorating geological conditions and the falling price of coal. In its final years, the company listed a £30 million loss on the plant.