 By 1943, while the original was still in service with flak and searchlight batteries, the used the for ground-controlled interception, vectoring German night fighters on to British bombers.The were installed in pairs, as seen in Hill's Walcheren pictures, because one set tracked the bomber while the other tracked the fighter, until the fighter's airborne radar acquired the target.Jones mentioned the Friedrichshafen findings to Prime Minister Winston Churchill's chief scientific adviser, Lord Cherwell (Professor Frederick Lindemann), in whose Oxford laboratory Jones had once worked as a researcher.