I do not think that the "know-how" is being lost. Apart from the British SC1, the German experimental Dornier 31 is the subject of a joint study which is being undertaken between Hawker Siddeley and Dornier with British engines. Our own view, which must be tentative at the moment, is that the Rolls-Royce concept is better suited to transport aircraft than to combat aircraft, where the minimisation of weight is the most important consideration.