Donald where's yer troosers?
In this case Donald must be the piper, the rest of the 92nd (Gordon) Highlanders are wearing their campaign dress. Donald has retained his kilt and feather bonnet.
These are casts from a conversion inspired by this illustration: -
The conversion and the casting are down to Royston (thanks mate, sorry it took me so long to get round to painting these!)
I guess the reference in the post title might be lost on any non-brits and/or anyone under the age of 60, so here you go: