I'll ask herself who has some recent experience, though for bigger groups. But I think she knows an Edinburgh company that can help.
If they want to see parts of the country outwith the cities, there are many options, eg Rabbies. They're well established & the guides we've chatted with seem very good.
I think This Is My Glasgow (npub1904…tf7j) does foot tours of Glasgow, which may not suit elderly folk.
