Kammala jumla mai zuwa: A watan Agustan 1939 Cunningham ya koma rundunarsa wadda aka sanye da wani nau'i na Bristol Blenheim. Ba shi da sha'awar jirgin sama. An kawar da turret don rage nauyi da haɓaka saurin, amma ba a dumama kayan tashi da matukin jirgi ba, wanda ya haifar da rashin jin daɗi ga ma'aikatan jirgin a lokacin hunturu. Gidan rediyo ya yi gajarta a cikin kewayon wanda ya haifar da matsalolin sadarwa. Blenheim ta matukin jirgi windshield da aka yi sama da dama bangarori da kuma da wuya a tsabtace. Hakanan yana iya yin hasken haske, wanda ya sanya haɗin gwiwa tare da hasken wuta mai haɗari. A ƙarshe, an sami matsaloli tare da kayan aikin makafi. Rundunar ta yi asarar wasu asarar saboda rashin gogewar ma'aikatan da ke sintiri a kan tekun Arewa daga RAF North Weald a Essex, da dama daga cikinsu sakamakon matsalolin jirgin sama. A watan Janairun 1940 604 ya koma RAF Northolt kuma ya tashi Blenheims da aka yi wa ado a cikin "Swastika" na Sojojin Sama na Finland zuwa Finland ta hanyar Sweden don taimaka wa ƙasar bayan da
Mamayewar Soviet.