So I guess that you're in South Yorkshire (Gods' own Country) or thereabouts?
Nope, even further north than that - Cumbria - the place that is making headline news at the moment with massive flooding and bridges collapsing and so on.
Now, a little more on this Pear Tree Pottery - I've had an email!

From a very helpful lady called Jane Housely of the University of Plymouth, who says this:
I've looked through the correspondence on Pear Tree Pottery. I can confirm that the Pottery was in Laughton and going strong in the early 1970s. The potter was Roy Newman, now chairman of the Dinnington & District Historical Society. I had some lessons with Roy in the early 70s but regretfully have very few of his pieces.
Can you please pass this on to the relevant person.
I'm sure they can contact Roy through the historical society and he will give them all the info they need.
There's a photo of Roy here:
http://www.dinningtonhistory.co.uk/about_us/