Too bad this didn't find Longshanks heart!
I cringe at the scene where Longshanks seems fearful about the Scots coming south, after the sack of York. He fought & won a civil war (Baron's War) when he was in his 20's, during his father's reign. He had survived a murder attempt by an Assassin (Shi'ite Muslim sect) in 1272. The Assassin stabbed him with a poisoned dagger.
Sorry, in the great traditions of the English monarchy, Longshanks had no heart.