Optics' Taunton site, but the Trade Unions and Taunton Deane District Council are working to reverse or mitigate these decisions. Bath had Ministry of Defence offices across several parts of the city but these had closed and transferred to Filton's Abbey Wood site near Bristol by March 2013; and Norton Fitzwarren is the home of 40 Commando. Other high-technology companies include the optics company Gooch and Housego, at Ilminster. Agriculture and food and drink Agriculture and food and drink production continue to be major industries in the county, employing over 15,000 people. Apple orchards were once plentiful, and Somerset is still a major producer of cider. The towns of Taunton and Shepton Mallet are involved with the production of cider, especially Blackthorn Cider, which is sold nationwide, and there are specialist producers such as Sheppy's Cider Burrow Hill Cider Farm and Thatchers Cider. Gerber Products Company in Bridgwater are the largest producer of fruit juices in Europe, producing brands such as 'Sunny Delight' and 'Ocean Spray'. Development of the milk-based industries, such as Yeo Valley Organic, has resulted in the production of ranges of desserts, yoghurts and cheeses, including Cheddar cheese – some of which has the West Country Farmhouse Cheddar PDO. Clothing Towns such as Castle Cary and Frome grew around the medieval weaving industry. Street developed as a centre for the production of woollen slippers and, later, boots and shoes, with C&J Clark establishing its headquarters in the town. C&J Clark's shoes are no longer manufactured there as the work was transferred to lower-wage areas in Asia, such as China. Instead, in 1993, redundant factory buildings were converted to form Clarks Village, the first purpose built factory outlet in the UK. C&J Clark also had shoe factories, at one time at Bath, Bridgwater and Minehead, to provide employment outside of the main summer tourist season, but these satellite sites had been closed, in the late 1980s, before the main site at Street. Dr. Martens shoes were also made in Somerset, by the Northampton-based R. Griggs Group, using redundant skilled shoemakers from C&J Clark; this work has also been transferred to Asia. Mining and quarrying Coal mining was an important industry in north Somerset during the 18th and 19th centuries, and by 1800 it was prominent in Radstock. The Somerset Coalfield reached its peak production by the 1920s. All the pits have now been closed, the last in 1973.