Fresh calls for border poll - after Brexit, is a referendum on united Ireland likely?

The SDLP has backed a border poll - a referendum on whether there should be a united Ireland. Party leader Colum Eastwood yesterday said the poll should be held after the UK has left the EU. Sinn Fein has been stepping up its demand for a referendum in the wake of last year's Brexit vote. But Tory Secretary of State James Brokenshire yesterday ruled out a border poll, saying the requirements for one were "not remotely satisfied". So where does that leave us? And if there was a poll, what would the main arguments on either side be? Stephen got the views of Alex Kane and Tom Kelly.