Well it's all down to this portion of the
Bayeux Tapestry
There are three guys here under where is says
Harold Rex Interfectus est, (King Harold is slain). One is pulling an arrow out of his eye, and this lead to the Harold arrow in the eye version. But then there's one figure killing another with a sword. And the theory is that actually this is Harold. As
Wikipedia summarises it:
QUOTE
The identity of Harold II of England in the vignette depicting his death is disputed. Some recent historians disagree with the traditional view that Harold II is the figure struck in the eye with an arrow. The view that it is Harold is supported by the fact that the words Harold Rex (King Harold) appear right above the figure's head. However, the arrow may have been a later addition following a period of repair. Evidence of this can be found in a comparison with engravings of the tapestry in 1729 by Bernard de Montfaucon, in which the arrow is absent. A figure is slain with a sword in the subsequent plate and the phrase above the figure refers to Harold's death (Interfectus est, "he is slain"). This would appear to be more consistent with the labeling used elsewhere in the work. However, needle holes in the linen suggest that, at one time, this second figure was also shown to have had an arrow in his eye. It was common medieval iconography that a perjurer was to die with a weapon through the eye. So, the tapestry might be said to emphasize William's rightful claim to the throne by depicting Harold as an oath breaker. Whether he actually died in this way remains a mystery and is much debated
And there's more
hereBut I guess if an Anglophilic history buff like yourself is unaware of it, there's little chance that the movie will include it, revionist tendencies in recent epics or not.
Matt