I reckon there's as many accents in East Anglia as there are parishes. I think in the old days that's how they used to amuse themselves in the dark winter nights, in between the songs. Like in Newfoundland where it's said no two parishes have the same accent.

Not that Essex is in East Anglia. Saxons, not Angles. (Though up in Norfolk they're really Danes, when they aren't Dutch.)