The Sinn Féin Leader Mary Lou McDonald called for a referendum on Irish unity over the next five years. Speaking to around 1,500 delegates in the Millennium Forum in Londonderry on Saturday night, McDonald added that power-sharing arrangements in the N. Irish parliament, Stormont, must be restored.

During her party conference, the leader of the biggest Republican party said Brexit has changed the way people thought about a united Ireland, noting that a so-called “unity poll” was no longer a question of “if” but “when.” The Sinn Fein leader went on to assert that “a border poll,” as it is referred to in the UK, must take place over the next five years.

She strongly supported her party’s abstentionist policy on Westminster and said no Irish elected representative could stop Brexit.

McDonald also said that Sinn Fein is ready to “do business” to restore power-sharing arrangements in Northern Ireland, working with the Democratic Unionist Party.