The differences and similarities between the film "King Arthur" and the text "Who are the British?"

The film “King Arthur” set in 2004 and the text “Who are the British?”, which is an extract from “The Mother Tongue” by Bill Bryson, are both dedicated to a particular period of the history of Britain. To my mind, the film is quite comprehensive and may give an insight in some historical events described in the text “Who are the British? ”. Nevertheless, the information given by these two sources differs a lot in some points.…