Photograph of farm finally taken you'll all be pleased to know I'm sure
I had a FB message from Carolyn who also gave me the link to clearing the memcache but she added the little snippet that no-one else had, to not be on my farm (or having it open in another tab) when clicking on the memcache link - this time it worked just fine.
I'm back in business thanks to the help in this forum, you guys all rock