I'm looking to buy a house (first time buyer) and I've seen an interesting property that is currently a (empty) retail space on the ground floor, and the above space is a self-contained flat (which is currently occupied by an assured shot-hold tenant). I would be interested in buying the property and converting the downstairs into a residential flat; then I would live in one flat and rent the other one out. My question is as the second flat will be self-contained will this be covered by a residential mortgage?
All of the research I've done mentions renting out rooms in your house. I can't seem to find anything applicable to this.
EDIT: I'm based in UK, Nottingham to be specific