1.The woman is clearly using an Edwardian laptop abacus (probably with about 2 or 3 kb (that's rows of beads) of memory, if my memory serves me right).
2. The shop owner later became a largish northern dairy company headed by his Gt, Gt, Grandson Dennis... but not as big as ASDA.
3. It's clearly before the age of the motor car, as the hotel is catering exclusively for the nu-fangled bicycle tourist trade.
4. The shopkeeper has a flat cap on, which clearly marks him as a provincial northern type small business person. He must therefore keep racing pigeons or ferrets on his allotment and go to the Methodist Church, and he probably likes seed cake (but don't label me as a stereotype labelling person).
5. Uhh, I haven't a clue where it is really... so I may be quite wrong...