Cika wannan jumla: Bayan
Faransa ta mika wuya, František ya gudu zuwa Burtaniya kuma bayan horo a ranar 2 ga watan Agusta an sanya shi zuwa Squadron na 303 na Poland da ke RAF Northolt, yana yawo da mayakan Hawker Hurricane. An yi amfani da František zuwa jirgin sama mai tsufa tare da saurin saukowa, kuma a ranar 8 ga watan Agusta a ƙarshen jirgin horo, ya manta ya saukar da jirginsa na Hurricane wanda za'a iya cirewa kuma ba da gangan ya sauka a ciki. Ba a ji masa rauni ba, kuma za a iya gyara jirgin. Rundunar ta shiga aiki a mataki na karshe na yakin Birtaniya. Farkon nasarar da aka tabbatar da František shine harbi Messerschmitt Bf 109E a ranar 2 ga Satumba, 1940. Nasara ta biyar da ya yi kusan ta kashe shi. A ranar 6 ga Satumba ya harbe Bf 109E na &lt;a href="Jagdgeschwader%2052"&gt;III/JG 52&lt;/a&gt; kusa da Sevenoaks a Kent, amma Hurricane na František ya lalace sosai har ya tilasta masa sauka kusa da Falmer.