Very interesting. I have a PDF copy of...

A Narrative of the Visit of George IV to Scotland, In August 1822. By an Eyewitness of Most of the Scenes Which were then Exhibited , Edinburgh: 1822.

I referenced it re: the Robertson White Line setting, c1820 - more specifically first-hand recognition of Highland Finery and Regency Dress, corroborating your SRT notes on that sett. Now, I'll have to re-read the text for observations of the King's kit itself.

Ryan