AlieOxon don't know about the shop in Oxford but there is one in Abingdon and one in Bourton-on-the Water.
What memories the names of these choc bars bring back, the Fry's choc cream bars were my Mother's favourites. I think they were white inside, but I do remember a pale green marzipan choc bar.Tiffin was one of my faves as a child, with raisins and bits of biscuit in it.There were wonderful toffee bars called McCowans [rectangular bars] either plain toffee or best of all covered in chocolate. YUM.Also toffe, there were penny arrows, anyone remember them?I find that age brings a reduction in the sweetness of tooth, and nowadays I prefer good Belgian or swiss chocolate only, and not very often, but still remember the happiness and anticipation [ a bit like the 5 boys!] of waiting to be served in the local sweet shop.