Is it possible, that for the purposes to trying to destabilize the British and or NATO; that the Soviets throw massive, but clandestine support to the IRA (doesn't matter when, I'm not an expert on the IRA, so feel free to take liberty with the dates) a la the American support to the islamic fighters in Afgahnistan in the 80's
and if it is possible, what might be the fall out and consequences