In Saltash (the other side of the Tamar Bridge from Plymouth) there is a grocery shop preserved as it was when it closed in the 1970's because the owner did not want to deal with decimalization-
https://www.tamarprotectionsociety.org.uk/elliotts
And here is a You Tube Video of the shop- https://www.youtube.com/watch?v=zy3Z5CisqhU