I was flipping channels waiting for the hockey game to start [from Wrigley ] and there was a Highland Regimental style band from ?Liberty High School? and according to the commentary they are the only HS band to perform with the Coldstream Guard and for the Queen. They were wearing lovely red Regimental Doublets and the Pipers were kilted [I did not get a good look at the drum line] but the rest of the band was wearing pants [may have been trews, it was a long camera shot].
Apparently they were wearing authentic regimental buttons as well.