The Fianna Fáil leader has described the relationship between the British and Irish Governments as "superficial".
Micheál Martin has accused both sides of being focused on talk rather than action.
He was speaking at his party's Easter Rising commemoration ceremony at Arbour Hill in Dublin this afternoon.
Deputy Martin says there's a lack of substance when it comes to enhancing North-South relations.
He claims the current governments have taken a hands-off approach to addressing vital remaining issues in Northern Ireland.
