I don't see any spillover effects. Even if the actors in the Basque process have drawn inspiration from the Ulster process leading to Stormont, the similarities end there. Especially because the Stormont agreement pales in comparison with the current (and much vilified by the Nationalist) Basque Autonomy Statute, including the ability of the Central Government in London to suspend the Northern Ireland parliament and government, which would be unthinkable in Spain already.

guaranteed to evoke a violent reaction from police is to challenge their right to "define the situation." --- David Graeber citing Marc Cooper