They need to find them ASAP, before they can attack. I am sure it is very difficult, but need to try and maybe they will succeed in catching them and preventing the planned terror attack.
And need to warn Iran, that if such attack happens, they will hold Iran directly responsible.
> They need to find them ASAP, before they can attack. <
The problem is that many Muslims can spontaneously become terrorists. We have seen that happen many times.
Let’s say the U.K. strikes back at Iran. I can see some “peaceful” UK Muslims just deciding one afternoon, let’s get some payback. And they wouldn’t need to amass a ton of explosives. A couple of Molotov cocktails would do.