Continuity mistake: On the rooftop while shooting at the Russians, John dives through a skylight. In a side shot he's falling back first, then he lands on his front.
Continuity mistake: When the body of Glyndwr Michael (Major Martin) is found by fishermen near Huelva, the sun is setting in the west, almost touching the horizon. The shot of the cart wheeling the body towards the town is filmed, judging by the shadows, at about 3 or 4 in the afternoon. (01:17:57 - 01:18:53)