The main sticking point in Brexit negotiations is how to keep Britain's land border with the Republic of Ireland open after it leaves the European Union.
Northern Ireland's DUP, which is threatening to bring down the British government over Brexit compromises, is a party with hardline views whose negotiating tactics were forged in war.
The main sticking point in Brexit negotiations is the future of the Irish border once Britain leaves the EU, with Brussels and London seemingly at loggerheads over the issue.
From the shock vote to leave the European Union to key negotiations in Brussels, Brexit minister David Davis's resignation is just the latest milestone on the path to Britain leaving the European Union:
With Britain just a year away from leaving the European Union, the transition deal agreed between the two sides is viewed as a key element to absorbing the Brexit shock.