Thats not threatening at all. All UK planning for exceptional circumstances (loss of power grid, pandemic, asteroids, major airplane crash, whatever) uses armed forces to supplement local authority.Annnd... we're done.
I always said the day the put boots on the streets would be the day I left.
(I've already left, but for sure never going back)
Thats because local authorites are so undermanned they have trouble carrying out their normal duties that they cant deal with anything exceptional.
I mean, lets say they find an unexploded WW2 bomb somewhere, and Army EOD turn out to defuse it, is that a sign of military authority being enforced on the populace, of course not.
When the Special Recon Regiment tail suspected terrorists around London, thats not a sign either, is it?
When the army covers for striking fire fighters and rescues old ladies from burning buildings, that isnt a sign either.
But if you see armed soldiers patrolling with police, then you are heading that way (although it may just be because you have a lot of muslims living in your country).
Things are not black and white, the world is somewhat nuanced. Overreacting is as bad as not reacting enough.