William George Warren Harland

Britoil Ltd. engages in extraction of crude petroleum. The company is headquartered in Aberdeen, the United Kingdom.

Founded in 1928, BP Pension Trustees Ltd. is a pension and British retirement fund company. Part of BP Plc, the company is based in Sunbury-on-Thames, UK.

Shell-Mex & B.P. Ltd. operates as a British non-trading company. The joint venture company is based in London, UK.

BP Exploration Operating Co. Ltd. provides supportive activities for the exploration of oil and gas. The firm produces liquefied petroleum gas, solar powered energy, marine fuels, and industrial lubricants. It operates in Libya and Russia. The company is located in Wareham, UK.

BP Europa SE distributes liquefied gas products. The company was founded on 30 April, 2010 and is headquartered in Bochum, Germany.

Part of BP Plc, BP America Ltd. is an investment holding British company. The company is based in Middlesex, UK. Founded in 2014, BP America functions as an investment holding company.

Rolls-Royce Plc manufactures aircraft, marine and generator power systems. Its products include civil large, small aircraft and helicopter engines. The firm provides complex, integrated power systems and services to the aerospace and marine and industrial power systems markets. It also develops and provides comprehensive service packages for managing engines throughout their life-cycle. The company was founded in 1971 and is headquartered in London, the United Kingdom.