The Secretary of State’s power to call a border poll in Northern Ireland: why British-Irish institutional cooperation is essential

Should there be a referendum on the issue of Irish unification, the Irish government would be expected to play a central role. Etain Tannam argues that Brexit created new tensions in British–Irish relations and has highlighted the need to have firm institutional cooperation between both governments before any referendum is called. As Irish unification would alter greatly the Irish state and the Irish electorate would have to approve of unification by referendum vote, the Irish government’s role is highly significant, even though it has no formal powers in this area in the Belfast/Good Friday Agreement. Moreover, the sensitivity of the unification issue and the need to avoid increasing the sectarian divide imply that longer term management by both governments and joint framing of the issue is required.

The Brexit referendum in 2016 almost immediately reignited the issue of Irish unification, given that a majority of the population in Northern Ireland voted to remain in the EU, including the vast majority of cultural Catholics. The unification issue has surfaced periodically since 2016, though with the exception of Sinn Féin, Irish political parties do not wish to place it on their agendas given its sensitivity. It is clear however that combined with demographic changes in Northern Ireland and the impact of Brexit on support for Scottish independence, there is far more informal discussion of Irish unification than in previous decades. Only the Secretary of State for Northern Ireland has the statutory power to call a referendum on Irish unification, if they perceive there to be evidence of majority support in Northern Ireland for unification. However, in practice, given the fundamental implications for the Irish state and given Irish governments’ role in the peace process and in the Belfast/Good Friday Agreement, the Irish government would be expected to play a central role.

There are many reasons why the Irish government’s role would be crucial. Unification would have complex and wide-ranging impacts on Ireland, necessitating an Irish input into the timing of a referendum on unification. Many referendums could be required to amend the Constitution, dealing with a range of issues, including federalisation of the state and of protection for unionist identity in a new state.  Continue reading