I don't remember this one. Looks as though it might be 10, Causewayhead, premises which change quite frequently. A search engine returns Mr Christophers, Mama Ruth, Causeway Kitchen, Chompy's and Gourmet Burgers at this address.
Mount's Bay Trading is 8-9 Causewayhead, this has '10' on the door. I stated above that it has changed names many times; I think the latest incarnation is Causeway Cafe or Causeway Restaurant and Cocktail Bar . I expect one of the locals will confirm the current name.
c1930 - c1950 it was Jelbart's Dairy, the place for clotted cream; three and a half pence (pre decimal) for a quarter pound. I notice that Humphreys also primed on clotted cream.