Rubuta ci gaba ga wannan sakin layi - A watan Maris na 1944 Cunningham ya bar umurnin Squadron na 85. An nada shi kyaftin din rukuni a cikin umurnin Ayyukan Dare a No. 11 Group RAF. A shekara 26, yana daya daga cikin matasa da suka rike wannan mukamin. Air Marshal Roderick Hill ya tambaye shi ya bayar da rahoto ga de Havilland a kamfanin tare da Adolph Malan. Za su gwada jirgin De Havilland Vampire. Cunningham ya yi sharhi cewa na'urar za ta zama cikakkiyar mayakan dare. Ko da yake bai san yadda jirgin de Havilland Goblin mai turbojet yake aiki ba, ya ba da shawarar cewa idan aka faɗaɗa ɗakin matukin jirgi don ya ba da wuri ga mai kula da jirgin da kuma tankunan mai da aka faɗaɗa, irin wannan jirgin zai iya zama jirgin sama mai ɗaukan man fetur mai ban tsoro. Yayin da yake gwajin gwaji, Cunningham da Rawnsley sun yi tafiya a kan Normandy daga RAF Uxbridge. Sun tashi sama da yankin Burtaniya a ranar 9 ga Yuni 1944 a matsayin Yaƙin Caen
ya fara. An kai su kan jirgin saman abokan gaba amma ba su iya ci gaba da hulɗarsu ba.