The Northern Ireland under-secretary of state Fleur Anderson has said publicly that opinion polls will determine if and when a referendum on Irish unity is called. It’s never been exactly clear what would trigger a poll on a united Ireland – so has she overstepped the mark, made a mistake or actually let the cat out of the bag. 

And who are this middle-ground who have the magic votes? 

Ciarán Dunbar is joined by Professor Jon Tonge from the University of Liverpool and political commentator Ursula Savage. 

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