Revealing mistake: When the armored army attacks the Germans, one of them falls on the floor and rolls away. Note the grass and you'll see that part he falls on has a darker color, revealing there was a safety mat underneath. (01:51:48)
Factual error: At Portobello Market, when the kids are eating, there's a sign that reads "cookies." No chance there would have been anything like that in 40's London. It would definitely have read "biscuits."
Other mistake: The interiors of Miss Price's house is definitely not from a British country house. The ground floor looks more like an American 70's house.
Answer: All I could catch was "VORAN,VORAN" which means "Go, go!"