The British Army hasn't disbanded either or decomissioned its weapons. That doesn't mean it's still engaged in fighting a war in Ireland.

Mind the official line in Whitehall and Westminster was always that there wasn't a war in any case. So there's no war to begin with - but until the other side says it's over, it's still on - except that there's never been a war... Which demonstrates that the kind of logic sometimes disparagingly referred to as "a bit Irish" is rather more widespread than that.