Mary Lou McDonald defends Sinn Féin's 'abstentionism mandate' in Westminster

Sinn Féin leader Mary Lou McDonald has again rejected calls for the party's Northern MPs to take their seats in Westminster, insisting this would just add to the Brexit chaos there.

One motion - aligning with the EU's custom's union to resolve the Brexit deadlock - failed by just three votes in Westminster on Monday. Now there is pressure on Sinn Féin to add its voice there.