The rolled blanket had to be carried like this by officers because they did not have knapsack straps like their men. This illustration by Pierre Turner shows clearly the silver thistle badge on the gold collar and the red stripe down the trousers. The stripe was 1.5 inches wide and the trousers were Oxford mixture, not blue.
Guards officers would have looked like this from their landing at Kalamita Bay on 14th September until the Battle of the Alma on 20th. The white trousers normally worn up until 14th October were left behind in Varna and dark winter trousers worn. The battle of Inkerman was fought on a foggy night in November so greatcoats were worn.
Uniforms | Regimental Details