I think it is quite historic that these people have come together and reached an agreement which I believe will frankly open a new dawn not only for Northern Ireland, but also for the whole of Ireland. The 1998 Good Friday Agreement (GFA), on which the current system of decentralisation in Northern Ireland is based, is similar to that of Sunningdale.  Irish politician Séamus Mallon, who participated in the negotiations, called the agreement „Sunningdale for slow learners.“ This claim has been criticized by political scientists such as Richard Wilford and Stefan Wolff. The former said that „it`s… [Sunningdale and Belfast] have considerable differences, both in terms of the content and circumstances of their negotiation, implementation and implementation.“  There have been disagreements between the parties in the Assembly and the role of the Council of Ireland has not been clarified. On December 9, a press release was issued announcing the agreement, which was later announced as the Sunningdale Agreement. The Sunningdale Agreement, named after the English town where it was negotiated in 1973, gave a glimmer of hope. This agreement resulted in the creation of a new assembly in Northern Ireland,… Finally, it was agreed that the Council executive would be limited to `tourism, the protection of nature and aspects of animal health`, but this did not reassure the Unionists, who saw the Republic`s influence on northern affairs as a further step towards a united Ireland. They had their fears confirmed when, in a speech at Trinity College Dublin, SDLP Councillor Hugh Logue publicly described the Irish Council as „a vehicle that would plunge trade unionists into a united Ireland“.“  On 10 December, the day after the agreement was announced, loyalist paramilitaries formed the Ulster Army Council – a coalition of loyalist paramilitary groups, including the Ulster Defence Association and the Ulster Volunteer Force, who would oppose the agreement. In January 1974, the Ulster Unionist Party narrowly voted against further participation in the assembly and Faulkner resigned as leader to be replaced by the anti-Sunningdale Harry West. Parliamentary elections were held the following month.
The Ulster Unionists formed the United Ulster Unionist Council (UUUC) as a coalition of anti-union unionists with the Progressive Union Vanguard Party and the Democratic Unionist Party to field a single anti-Sunningdale candidate in each constituency. The pro-Sunningdale parties, the SDLP, the Alliance, the Labour Party of Northern Ireland and the Pro Assembly Unionists, made up of Faulkner`s supporters, disagreed and clashed. When the results were de-reported, UUUC won 11 of the twelve constituencies, some of which were won by split votes. Only West Belfast has returned a pro-Sunningdale MP (Gerry Fitt). UUUC has declared that this is a democratic rejection of the Sunningdale Assembly and executive and has tried to bring it down by all means. … Heide, which resulted in the Sunningdale agreement. This agreement recognised that Northern Ireland`s relations with Great Britain could not be changed without the agreement of a majority of its population and provided for the creation of a Council of Ireland composed of members of both … On 4 January 1974, four weeks after the signing of the agreement, the Ulster Unionist Council voted by 427 votes to 374 against the new Council of Ireland.