Little John has a very short beard throughout the programme until the last scene where it is a full bushy beard, only 2 days after the opening scenes.
Much can be seen playing the blindfold game with Martin and the other outlaws in Sherwood when he is really supposed to be in the Nottingham Castle dungeons.
When Brother Tuck starts to go to Nottingham to check for Much, he wears a light gray cap. But when he is shown walking through the forest, his cap is brown as the rest of clothes.
EDIT: The top of Tuck's head is supposed to be shaved.