The Armed Forces are benefiting from the pioneer work done by the Royal Radar Establishment in this field. In particular, these techniques are being applied to air-to-air guided weapons for the Royal Navy and the Royal Air Force. We have the Firestreak missile in service which is the best weapon of its kind in service today. There is close contact between all the departments concerned. We also have full liaison with the United States and our two countries are deriving benefit from each other's work.