Interesting. It does indeed sound like a Brit. But what is this text anyway? Just some guys's fanfiction or from an in-game book?
It was, I believe, a Morrowind prerelease teaser from Bethesda.
And I have to say, the Dunmer sound pretty much like many real cockneys. I don't think they sound like an American pretending to be cockney.
Except that many scholars believe that the British dialect of the Renaissance era was much closer to American Southern than to any modern British dialect,
Ooh, that's always been one of my pet theories. I've noticed similarities in dialect and pronunciation between the Americans and the north of England.
(we both know what pants are, for example, and we know that bath does not have an "R" in it)