Amazing what you can find out on t'internet in such a quick time.... I posted your query on the British & Commonwealth Military Badge Forum (no, I'd never heard of it either till I Googled...)
It seems your grandad was a paramilitary....!! He's wearing the uniform of
The Legion of Frontiersmen.
The Wikipedia entry for this lot seems to have been tampered with slightly, but the following extract gives you the idea...
The Legion of Frontiersmen is a patriotic paramilitary organisation formed in Britain in 1905 by Roger Pocock, a former Constable with the North-West Mounted Police and Boer War veteran, with its roots firmly set in another era - though some would say on another planet entirely, to bolster the defensive capacity of the British Empire. Prompted by pre-war fears of an impending invasion of Britain, the organisation was founded as a field intelligence corps on a romanticised conception of the "frontier" and imperial idealism. Headquartered in London, branches of the Legion of Frontiersmen were formed throughout the empire to prepare patriots for war and to foster vigilance in peacetime. Despite persistent efforts, the Legion never achieved more than sporadic and tenuous official recognition, but many[citation needed] of its members enlisted at the onset of the First World War. Wartime casualties devastated the Legion of Frontiersmen[citation needed], and except for a brief resurgence in the interwar period, a series of schisms and sectarianism prevented attempts to reinvigorate the movement. Various Legion of Frontiersmen groups still exist throughout the Commonwealth, but as a whole, it has been unable to define its niche in the post-imperial world.
All Legion members were volunteers. In the late 1930s, the Legion of Frontiersmen was formally affiliated with the Royal Canadian Mounted Police, but after a schism split the Canadian Frontiersmen, the RCMP severed formal ties. Still without any formal recognition, Frontiersmen enlisted individually in the Second World War.
Here's a picture of similarly outfitted Frontiersmen from the Guelph police archives.... (Guelph is a town in Ontario, Canada.... every day's a school day....
)
http://www.guelphpolice.com/assets/Arch ... naires.jpg
And it seems our happy Frontiersmen are still going strong.... though they're probably more akin to fellas that join the Royal Antediluvian Order of Buffaloes than anything resembling quite so militaristic an organisation as their original concept aimed for
http://www.legion-of-frontiersmen.net/
They still have badges of rank (british army pattern) and the whole works too! Including para wings, commando badges and jungle survival badges... Want one...........
http://www.legion-of-frontiersmen.net/
Don't thank me.... thank t'internet.....
