Jasper's Engish accent is different in the first episode than in all the other episodes.
The casket of Prince Robert, who is first in line to the throne is covered in the Union Jack, however as Crown Prince his casket would be covered in his Royal Standard.
Prince Liam's hair changes constantly one minute he has long hair the next shorter then back to the longer. As well as disappearing facial hair when he gets to the palace after being told to return he doesn't have any then when he goes to talk to Princess Eleanor he has lots of facial hair.
Liam tells Helena that King Henry Viii killed one of his wives because she was fat. He never did that. He had two of his wives killed but neither because they were fat. He did divorce one because he thought she was unattractive though.