This seems like a plausible what-if. Suppose that the Troubles are either slightly worse or the Prime Minister is just less tolerant of them, they could arguably invoke NATO's Article V and force the rest of NATO to either get involved or make the alliance protecting them from the Soviets look like a paper tiger.
However, I'm not an expert on the history of this time period, so I can't really do informed speculation, but hopefully, you guys could.
However, I'm not an expert on the history of this time period, so I can't really do informed speculation, but hopefully, you guys could.