Cheshire and Martin discussed their proposed method with Cochrane, who agreed to allow them to try it. The target would be the Gnome et Rhône aero-engine factory at Limoges in France. The air defences would be lighter, but there were two problems with this target. The first was that the factory was surrounded by the homes of the factory's French workers. Secondly, the plant was running around the clock, so French workers would be in the factory when it was attacked at night. As it was a target in France the proposal to bomb it had to be sent to the War Cabinet for approval. The raid was approved, but with the condition that they were forbidden from taking any civilian lives. It would be their one chance to prove low level marking in combat.