Revealing mistake: The paving slab Broomhilda falls onto and supposedly breaks is already broken.
Revealing mistake: You can see that a huge rectangular hole has been cut into the ceiling of Latrines boudoir and filled in with balsa wood for when Rottingham gets catapulted through.
Revealing mistake: At the start when the fire arrows are hitting the hay roofs, you can clearly see wet patches of petrol or kerosene on the roofs, so that the fire can ignite quickly.
Revealing mistake: When Robin receives the locket from Blinkin, Robin takes the locket off his arm, where Blinkin placed it, and over his head onto his neck, but the locket quickly opens in this action and the actors continue on as if they hadn't just accidentally opened the locket which we later discover must be broken to find what's truly inside.
Revealing mistake: When Blinkin falls out of the look-out post and crashes into the large tree, you can see it wobble.