After this agreement, both the French and British governments were worried about the plane. The plane needed a new type of engine from Rolls-Royce, the RB207. In December 1968, the French and British companies (Sud Aviation and Hawker Siddeley) thought of a different design: the Airbus A250, which would have 250 seats. This design had its name changed to the A300B, and it did not need a new type of engine, which saved money. To get more U.S. airlines to buy the plane, American General Electric CF6-50 engines were used for the A300 instead of Rolls-Royce engines. The British government was upset and decided to stop supporting the A300. However, Hawker-Siddeley did not leave, and designed the wings for the A300.