http://www.buryfreepress.co.uk/news/norfolk-and-suffolk-top-the-uk-s-treasure-charts-1-8258330
well I never knew that.....doesnt say if the reason is because there are more detectorists in thoses areas or if there are more things to find.....or a bit of both
The BBC coverage also mentioned the high proportion of cultivated land in East Anglia as a factor.
more arable and therefore accessible farmland means more finds then I suppose