The British government’s understanding of the Good Friday Agreement has been questioned amid claims Irish citizens living in the north may not be allowed to vote in a future Irish unity referendum.

Research by Unesco chiefs highlights risk to peace in event of rushed border poll.

It is "irresponsible" for the Irish government to say a border poll should not be held at the moment due to uncertainty about Brexit, Sinn Féin president Mary Lou McDonald has said.

Several cabinet ministers have told the BBC a no-deal Brexit could lead to a vote on Irish unification.

Mary Lou McDonald says there is a ‘growing demand’ for unity poll.