Thanks Jodester, fascinating stuff.
Butterflies location Page 2
Thank you from me too! Last night I watched the episode, "An Attractive Visitor" (Series 2, Episode 6) and thought that the train station looked like the one in Moreton-in-Marsh, but wasn't sure. I am delighted to discover that it is. Of course, I first visited Moreton-in-Marsh nearly thirty years after the filming, so it is bound to look different.
Yep it is definitely Moreton on the Marsh in Gloucestershire.
Take a look at Gloucestershire On Screen below for filming locations, photos and info
http://www.gloucestershireonscreen.co.uk/home/1970s/butterflies-tv-1978/butterflies-part-3