I'm not going to Ryton this year, they've changed the date so that it
clashes with my local Potato day in Hampshire - whcih has more
varieties and lots more going on details are at
http://www.hhdra.org.uk/potatoday.htm

If you're not close to Hampshire or Ryton, don't worry there are others
up and down the country - see http://www.hhdra.org.uk/potato.htm#days
Phil