In the two years after this, both the British and French governments thought the project would fail. 75 orders were needed before 31 July 1968. The French government thought about leaving the partnership, because it was worried about the costs of the Airbus A300, Concorde and the Dassault Mercure. The French government was persuaded to stay. The British government left the partnership on 10 April 1969. Hawker Siddeley was helping until the British government left, and France and Germany did not want to design the airbus' wing (which Hawker Siddeley was doing). Hawker Siddeley was allowed to keep helping, but it did not have any help from the British government.