Every self-respecting British-Imperial force should have a kilted unit. Here's mine but no tartan in sight, only Hodden Grey. Footsore Miniatures with Woodbine heads and a Jazz Age Imperialism Lewis Gun team from Empress Miniatures. The circular yellow patch is correct. Wearing the The London Scottish light blue hackle on the Wolseley helmet is entirely conjectural but it adds a little interest and colour.