Tunic looks the same but with Khaki breeks and Lord Strathcona boots. It is Countess Mountbatten's Own Legion of Frontiersmen. On the pocket is the 3rd Belgian Lancers pendant awarded to be worn in perpetuiy as the LOF served with them for a time in 1914. See www.frontiersmenhistorian.info/ if you are interested in knowing about the organization.
Dean