Unfortunately ... well maybe not unfortunately, the English went up to fight the Vikings and won, but whilst their army was busy the cowardly, sneaky, arsehole, weasel-like French attacked and the army had to rush South. Then ended up losing the battle of hastings. Would never have happened if not for the Viking intervention.
I say maybe not unfortunately, because obviously if the sequence of events hadn't played out, I and maybe you reading this (if you are English/French/Irish/Welsh descended), would probably not be here. Messing with the space-time continuum and all that. Great Scot.
Anyhoo, it would be silly to celebrate a battle that meant 200 years of Norman rule.