Complex sentence: Hitchcock returned to the UK for an extended visit in late 1943 and early 1944 and, while there, he made two short films for the British Ministry of Information: "Bon Voyage" and "Aventure Malgache".
Split into simpler sentences: Hitchcock returned to the UK for an extended visit in late 1943 and early 1944. While there he made two short films for the British Ministry of Information: "Bon Voyage" and "Aventure Malgache".