He fought on the Norman side at the Battle of Hastings, and afterwards received large grants of land forming an honour in England.

[11] Edward attempted to invest Eustace as castellan of a castle in Dover, which was met with resistance by the locals resulting in nearly forty deaths.

These events evidently caused a shift in Eustace's political allegiances, for he then became an important participant in the Norman Conquest of England in 1066.

But at the very moment when he uttered the words Eustace was struck between the shoulders with such force that blood gushed out from his mouth and nose and half dead he only made his escape with the aid of his followers.

[13]The depiction in the Bayeux Tapestry shows a knight carrying a banner who rides up to Duke William and points excitedly with his finger towards the rear of the Norman advance.

This conforms therefore with Eustace having somewhat lost his nerve and having urged the Duke to retreat while the Battle was at its height with the outcome still uncertain.

In the following year, probably because he was dissatisfied with his share of the spoil, he assisted the Kentishmen in an attempt to seize Dover Castle.

Eustace has been portrayed on screen by Leslie Bradley in the film Lady Godiva of Coventry (1955) and by Joby Blanshard in the two-part BBC TV play Conquest (1966), part of the series Theatre 625.