Isaak worked as a trouser-presser[REF] while his three sons (Grade and his younger brothers, Bernard (later Bernard Delfont) and Leslie) attended the Rochelle Street Elementary School near Shoreditch, where Yiddish was spoken by 90% of the pupils.
Following the start of the Second World War in 1939, Grade became involved in arranging entertainment for soldiers in Harrogate,[REF] and later joined the British Army.