The Sinn Féin leader says she can’t countenance any return to violence along the border with Northern Ireland.
There have been questions raised over what will happen in Northern Ireland in the event of a no deal Brexit.
There’s no desire among Irish, British or European politicians to see a return to a hard border, however the PSNI has warned of potential rising tensions post-Brexit.
Sinn Féin leader Mary Lou McDonald says there can’t be a return to the Troubles.
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