I'm also inclined to believe the reason for the decision was intelligence and not politics, because if it was political the parties responsible likely wouldn't shut up about until the next election. As of now there's been effectively 0 reaction from any political party. Though maybe that will change.
We've also currently got an outgoing cabinet, meaning they aren't really supposed to make major decisions outside of emergencies. That has always been one of those things where it's basically up to the honor of the politicians to actually not make major decisions as far as I can tell, so I'm unsure whether this is politicians politicianing or if there IS some emergency requiring intervention. I'm sure it'll all get more clear in the coming days.