§ Sir Patrick Wallasked the Secretary of State for Defence what progress is being made in co-operation with McDonnell Douglas in developing a supersonic jump jet.
§ Mr. ButlerWe are considering whether the successful co-operation on the Harrier GR5/AV8B programme can be extended to meet some of the longer term needs of the Royal Air Force and Royal Navy. Exploratory discussions are taking place with the United States authorities, and British industry is undertaking some preliminary work.