Hi Splash, I would suggest that the figure on the left in the Scots Guards, and the one on the right is Black Watch.
You can tell a lot from the sporran, and the bonnet hackle.
The Black Watch have a white sporran with five black tassles, with red hackle,............. and the Scots Guards have a white sporran with three tassles, and a half blue half red hackle.
So the painter is pretty spot on.
Are they London Bridge toys by any chance?...by Brittains?

This kinda thing is right up my street.

Neil.