We have been writing about the dangers of Hepatitis E for years on this blog, and also recording much on the newsgroup uk.business.agriculture, about the association with pig farming.
Google Groups search will help you with the newsgroup.
This blog has a search function leading to a number of articles over recent years.
Anyway, the evidence elsewhere (Cornwall) suggests that the association of pig farmers with their pigs is also a risk. There have also been outbreaks on British cruise ships sailing ex British ports.
That's another serious British veterinary scandal being blown, but so slowly: far too slowly.
Here is Food Quality News
Defra's report, Zoonoses Report UK 2012
September 2013 is here