//Speaking to The Herald on Sunday, Carlin elaborated on the significance of the decision by the IRA not to attack Scotland during the Troubles.
Despite the principle of non-aggression here, Scotland remained a key front for the IRA during the Troubles, he explained. The country was a base for fundraising, safe houses, and gun-running. The IRA’s governing Army Council did not want to risk violence in Scotland hampering such operations, or hindering support from Scots sympathetic to the republican cause.//
In the link already supplied.