We asked an expert on its use in Northern Ireland in the 1970s.
As Britain sends troops on to the streets it joins other European countries living under a state of emergency – but does the military and intelligence service response work to counter terrorism.
Because of the success of the £350m Big Lie, Tory politicians now feel free to make any promise without feeling a matching pressure to keep it.
It would be bliss to elect a pro-EU government that would ditch Brexit, says A C Grayling
With the clock ticking not only on Article 50, but also a UK general election, is Ireland the part of Europe with most to fear from Brexit’s fallout?
Brexit raises more and more questions for its backers. Yet they still have no answers
Former prime minister Tony Blair has warned of the huge “damage” to the country that will follow if Theresa May is able to pursue “Brexit at any cost”.
Brexit has raised some existential questions about national identity, with many Britons feeling their faith in Britishness eroding
Unanimously anti-Brexit, unanimously pro-British, Gibraltar must rely on the word of a government without many cards to play.
“We already miss you,” said European Council president Donald Tusk. “Thank you and goodbye.”
A family story of the close family bonds between Ireland and the UK, and what Brexit might mean for Ireland.
The sinister implications of Brexit for wildlife have rather gone under the radar thus far. But it is likely that we will all see the impact soon enough
Almost 8 months on from the referendum, the anger Brexit has engendered hasn’t dissipated one bit
85% of world is joining trading blocs... as we decide to leave
Brexit explained: Britain’s exit from the European Union has become widely know as “Brexit”. Find how Brexit started and why it matters.
The Brexit crisis is not the only emergency facing the UK and leaving the EU could spell the end for another union
The Prime Minister’s speech has set Britain on course for an ultra-Hard Brexit.
Why did the EU referendum happen and how could it be overturned? Brexit is not a done deal and this is how we can fight it
2016 will go down as a year of political shocks, the horror of Aleppo and England’s Euro 2016 football failure, but there were a few glimpses of hope. Month-by-month we look back on an eventful year
The threat of a hard border in Ireland is not a side issue in the Brexit debate, but a looming catastrophe for us all