Niall Ó Donnghaile (Sinn Fein) | Oireachtas source

That is an insightful answer but I wonder if Professor Harvey has a view on the mechanics of that. I would share his sentiment about the need for an Irish Government to challenge that, not only as co-guarantor but as co-defender, perhaps even the only defender, of the Good Friday Agreement. Does Professor Harvey see a role for the Irish Government as the negotiations progress in arguing with European colleagues or does he see other avenues, if there are any, for redress not only for the failure to implement elements of the Agreement but also a potential unilateral alteration as suggested by the constitutional affairs committee?