Andrew David Greensmith

General All Purpose Plastics Group Ltd., also known as GAP, is a leading independent stockist of UPVC building products in the UK. The private company is based in Blackburn, UK, and has subsidiaries in the United Kingdom. The British company owns several industry brands, including Rockdoor Ltd, Homeline Building Products Ltd, and Homeframe. GAP has multiple depots across the country, including one in Camberley on the Tuscam Trading Estate, where customers can find a wide range of UPVC building products at low trade prices. GAP Stamford specializes in underground drainage, ducting, and sewage treatments, but still stocks key UPVC building materials such as trims, fascias, and gutters. The company manufactures a range of UPVC building products, including fascias and soffits, gutters and downpipes, UPVC windows and trims, door panels, and Rockdoor composite doors.

Crown Oil Ltd. engages in the supply of oil and lubricants. It offers diesel, kerosene, heating oil, ancillary, biofuel, furnace fuel, and storage tanks products. The firm also provides emergency fuel and oil delivery, environmental, fuel management, fuel polishing and fuel system cleaner, and fuel uplift services. The company was founded by Harry Greensmith in 1947 and is headquartered in Bury, the United Kingdom.

General All Purpose Plastics Ltd. distributes PVC building products and related home improvement supplies. The private company is based in Blackburn, UK and has subsidiaries in United Kingdom. The British company was founded in 1993 by Simon Bird, Charles Greensmith. The CEO is Simon Martyn Terry Brayshaw.

Founded in 2017, GAP 2 Ltd. is a British company that distributes polyvinyl chloride doors, windows and building products. Part of General All Purpose Plastics Ltd., the company is based in Blackburn, UK.