Airbus UK is a wholly owned subsidiary of Airbus which produces wings for Airbus aircraft. When Airbus was incorporated as a joint-stock company in 2001, BAE Systems transferred its UK Airbus facilities in return for a 20% share of the new company. These facilities became Airbus UK. The company has two main sites responsible for the design and manufacture of the high-technology wings for all Airbus models as well as overall design and supply of the fuel system. For most Airbus models, the company is responsible for overall design and supply of landing gear. The company employs around 13,000 people at two sites: Filton, where the engineering and design activity takes place along with some manufacturing, and Broughton, where other major wing component manufacturing and all wing assembly takes place. History Hawker Siddeley (which merged with British Aircraft Corporation (BAC) in 1977 to form British Aerospace) was part of the first Airbus project, the Airbus A300. The British government withdrew support in 1969 but Hawker Siddeley was allowed to continue as supplier of the aircraft's wings due to the advanced stages of design and the reluctance of other nations to take over the wing design. In 1979 BAe rejoined the Airbus consortium. In 2001 Airbus Industries became Airbus S.A.S., the Airbus Integrated Company. Airbus UK started work on the wings for the Airbus A380 in August 2002. In April 2006 BAE Systems announced its intention to sell its share of Airbus SAS to EADS. BAE originally sought to agree a price with EADS through an informal process. However, due to the slow pace of negotiations and disagreements over price, BAE exercised its put option which saw investment bank Rothschild appointed to give an independent valuation. On 2 July 2006 Rothschild valued BAE's stake at £1.9 billion (€2.75 billion); well below the expectation of BAE, analysts and even EADS. On 5 July 2006 BAE appointed independent auditors to study why the value of its share of Airbus had fallen from the original estimates to the Rothschild valuation. On 6 September 2006 BAE agreed to sell its stake in Airbus to EADS for £1.87 billion (€2.75 billion, $3.53 billion), pending BAE shareholder approval. On 4 October shareholders voted in favour of the sale. Sites Airbus wing design and production was assigned to UK largely because of the advanced wing design of Hawker Siddeley Trident (D.H.121), designed by De Havilland. In the early