@vespucci_editor Yes I think almost all in my sample are sole traders too, and squeezed into physically very small premises in many cases.
One thing I've also realised, and that is especially relevant to hairdressers, is that there are far more businesses on small side streets than I used to think. It's partly because I tend to pass by at night when all shops on a side street may be shuttered, whereas shops on main thoroughfares are more likely to be open.
@alan @vespucci_editor this was the pattern for Europe 9 years ago.
Methodology: http://sk53-osm.blogspot.com/2015/05/retail-outlets-on-openstreetmap.html?m=1