Ok, how many relevant birds left and flyable does he have to film actually flying to put together a realistic airborne compilation?
The question that needs to be asked is; should the actual aircraft be used for making of any movie about World War II today?
Let's fact the facts. Bomber aircraft, except for some B-17s and other medium types of US bombers are very few, most are not flyable and in museums. Should the couple of remaining Lancaster Bombers that are flyable be put at risk remaking a movie?
Also, just how many Lancaster Bombers are flyable currently?