Donald Radcliffe Quilliam

Langham Industries Ltd. manufactures and sells marine equipment and industrial alloy castings. It offers service and repair facilities around the world for all propulsion equipment as well as supplying deck machinery and consultancy services. The company was founded by John Langham in 1980 and is headquartered in Dorchester, the United Kingdom.

Langham Farms Ltd. is a British company that engages in the cultivation of crops. The private company is based in Dorchester, UK. and has subsidiaries in United Kingdom. The company was founded in 2003.

Part of Langham Industries Ltd., Langham Land Ltd. owns and manages commercial and residential property. The company is based in Dorchester, UK and was founded in 1982.

Part of Langham Industries Ltd., Portland Port Ltd. is a commercial port that handles cruise ships, bunker vessels, and maintains a strong relationship with the Royal Navy and the Royal Fleet Auxiliary. Founded in 1996, the company is based in Dorchester, UK. The British company's operations, business development, and customer service staff cater to the current tenants on the dock estate and search for new opportunities for the port and the surrounding areas. The Portland Peninsula, together with the port, shelters a vast area of water, which has provided an excellent haven for shipping since ancient times. The company's history dates back to 1997 when Langham Industries took over control of Portland Harbour from the Royal Navy.

Stone Marine Propulsion Ltd. designs, manufactures, and repairs propulsion equipment. The private company is based in Birkenhead, UK.