Thanks for that Andrew.   Do the photos just show the name, or is there an address?  My one says Studio Royal, Uddingston.
The problem I have, is that the photo is of people who lived all their lives in eastern Aberdeenshire and I have no idea why they would ever have been in Uddingston - especially in the early 1920s, which is when I think my one may have been taken.   I did wonder if this was a photographer who travelled around the country.  Were your people local to Uddingston?