Meeting them in a shelter during a raid, he gives his children presents of carved model aeroplanes, and tells his wife she must return them to the country at once. As they argue, an ARP warden arrives with news of a family trapped in a burning house. Andy goes to help, but returns later to find that the shelter destroyed and his family dead. Meanwhile, to supplement Commonwealth forces, the RAF has been forming units of foreign pilots who have escaped German-occupied countries; the main difficulty is their lack of English-language skills. While on a training flight, a Free Polish squadron accidentally runs into an unescorted flight of German bombers. Ignoring the commands of their British training officer, they peel off one by one and shoot down several of the bombers with unorthodox aggressive tactics. Park rewards them by elevating them to operational status, leading Dowding to do the same for the Canadian and Czech squadrons as well. While discussing the day's events, Park and Dowding examine the German switch to London. Given a respite, Park notes that he will be able to repair his airfields and bring his squadrons back to full strength. Dowding adds that 12 Group units north of London are now all within range, while enemy fighters are at the extreme edge of their own range. He concludes that "turning on London could be the German's biggest blunder." The next German daytime raid is met by a massive response; watching his formations build up in 11 Group's operations room, Wing Commander Willoughby (Robert Flemyng) wryly states "this should give them something to think about." RAF fighters arranged into large groups, attack en masse, overwhelming the German raids. Luftwaffe losses are now critical and Göring is incensed, ordering his fighters remain with the bombers, an order the pilots hate because it robs them of the mobility required to keep the British squadrons off the German bombers. Losses continue to mount on both sides. The climactic air battle of 15 September 1940 arrives, with Winston Churchill in attendance at 11 Group's operations room. In the underground bunker, British ground control personnel order every squadron into the air to meet the massive attack. Intense combat in the sky over London follows, with both sides taking heavy losses. The outcome is so confused that Dowding refuses to comment on the events. The next day the RAF anxiously await a raid that never comes. Likewise the Luftwaffe is disheartened by heavy losses and also await orders that never come to resume raiding.