As Brexit talks continue to try and hammer out a deal between Britain and the European Union, the Irish border has become a major stumbling block.
EU negotiators have long-warned that talks cannot move on to the UK's future trading relationship with the EU until "sufficient progress" is made on three key issues: the border, citizens rights and the so-called Brexit bill.
The Taoiseach Leo Varadkar has said that Ireland will block the talks from moving forward unless a solution, ensuring there will be no hard border, is "written down in practical terms in the conclusions of phase one."
While Britain's International Trade Secretary Liam Fox said earlier this week: "We've always had exceptions for Ireland - whether it's in voting rights or residence rights in the UK - we've always accepted a certain asymmetry".
"That will have to be part of whatever agreement we come to with the EU.
"But we can't get a final answer to the Irish question until we get an idea of the end state - and until we get into discussions with the EU on the end state that will be very difficult.
"So the quicker we can do that the better."
Now British broadcaster Channel 4 has asked people on the streets there about the border issue. Specifically, if they even know where it is.
Some attempts were better than others.
Image via @Channel4News on Twitter
While one woman said: "I do think the Irish are just making trouble because they lost.
"It's a bit petty isn't it, really?
"The southern Irish have to lump it, basically, you can't always have what you want in life".
Could you draw Ireland's border with Northern Ireland? The border with Northern Ireland has become a major Brexit stumbling block. pic.twitter.com/yyqCRpPFuW
— Channel 4 News (@Channel4News) November 28, 2017