Damn!
Turns out that when I studied in Canterbury, I was a stone's throw (well, 23 miles according to one web site) from FOULNESS ISLAND. Had I known, I'd definitely have gone just for the souvenir shop.
My favorite part of the description: "The marshes of Foulness supported a considerable number of sheep during the Middle Ages."
I'm sure they did. (via www.thingsmagazine.net)
Foulness Island In Brief