group, located in shacks on the shoreline near Worth Matravers, was particularly exposed and only a short distance from German-occupied Cherbourg. While the move was taking place, A.P. Rowe took the opportunity to set up a second airborne group working with magnetrons, sidelining Bowen's group. Bowen was soon forced out of the TRE and sent on the Tizard Mission that summer. On 25 May 1942, Combined Operations Headquarters carried out Operation Biting to capture a Würzburg radar that had been photographed near the French coast. This led to concerns that the Germans might launch a similar raid on British installations. When reports were received that "seventeen train loads" of paratroopers had been stationed near Cherbourg, directly across the English Channel from Christchurch, near panic broke out in the Air Ministry, and yet another emergency move was made. The team ended up at Malvern College about to the north. This provided ample office space but little in the way of housing and introduced yet more delays in the development program. Operational use Service entry Despite all the problems, on 3 July 1942 Churchill held a meeting with his military commanders and the H2S group, where he surprised the radar designers by demanding the delivery of 200 H2S sets by 15 October 1942. The H2S design team was under great pressure, but they were given priority on resources. The pressure also gave them an excellent argument to convince Lord Cherwell that the klystron-based H2S program finally be dropped. TRE failed to meet the 15 October deadline; by 1 January 1943, only twelve Stirling and twelve Halifax bombers had been fitted with H2S. On the night of 30 January 1943, thirteen Stirlings and Halifaxes of the "Pathfinder" force used H2S to drop incendiaries or flares on a target in Hamburg. One hundred Lancasters following the Pathfinders used the flares as the target for their bombsights. The results were considered "satisfactory". Similar raids were carried out against Turin the next night, and Cologne on the night of 2/3 February. On 21 February, the decision was made to equip all Bomber Command aircraft with H2S, not only as a bombing aid but also as a navigation aid. In early operations, H2S had proved able to detect coastlines at such a great distance that it could be used as a long-range navigation system, allowing the aircraft to fly in all weather. To aid the navigator, the