Sinn Fein calls for Irish unity vote as protesters build mock wall

Sinn Fein leader Mary Lou McDonald says the Irish government must prepare for a referendum on Irish unity given the uncertainty around Brexit.

from UK News - The latest headlines from the UK | Sky News http://news.sky.com/story/sinn-fein-calls-for-irish-unity-vote-as-protesters-build-mock-border-wall-11618816