Protestors take part in a demonstration on November 20, 2021 in Newry, Northern Ireland, as fears grew that the UK government will trigger Article 16 which could see a return to a so called hard border. Getty Images
Then British prime minister David Cameron on his campaign bus in June 2016. Five years ago, British people voted in a referendum that was meant to bring certainty to the UK’s fraught relationship with its European neighbours. The decision on June 23, 2016 was narrow but clear: By 52 per cent to 48 per cent, they chose to leave the EU. AP photo.
David Cameron and his wife Samantha leave after casting their votes in the EU referendum at a polling station in London. AP Photo
Voters head to the polls on June 23, 2016 in Belfast, Northern Ireland. Getty Images
Nigel Farage, the leader of the UK Independence Party, celebrates and poses for photographers during a "Leave EU" party in London, in June 2016, after the voters chose to leave. AP Photo
Queen Elizabeth II welcomes Theresa May at an audience where she invited the former home secretary to become prime minister and form a new government, on July 13, 2016. Getty Images
After calling a snap general election in June 2017, Theresa May negotiated a deal between her party and Democratic Unionist Party to support a minority government. Getty Images
Theresa May and members of her Cabinet at the country retreat Chequers on July 6, 2018, where Ms May's new Brexit plans were agreed. Getty Images
Theresa May delivers a statement at Downing Street on November 14, 2018, after her Cabinet of senior ministers met and approved the wording of the draft Brexit agreement. Getty Images
Pro-EU campaigners stage a stunt outside Houses of Parliament involving a ship dubbed HMS Brexit on January 15, 2019 - the day MPs rejected May's Brexit plans in a vote. Getty Images
Then president of the European Council Donald Tusk and Theresa May at a round table meeting on April 10, 2019 in Brussels. The EU agreed to a flexible extension to Brexit until October 31. Getty Images
Theresa May outside 10 Downing Street on May 24, 2019 to announce that she would resign on June 7, 2019. Getty Images
Newly-elected Conservative party leader Boris Johnson poses outside the Conservative Leadership Headquarters on July 23, 2019. Getty Images
The Supreme Court rules that the prorogation of Parliament was unlawful on September 24, 2019. Britain's top court said that Prime Minster Boris Johnson acted unlawfully in August 2019 when he requested that the queen prorogue parliament for more than a month. Getty Images
With the campaign message 'Get Brexit Done' Boris Johnson wins a landslide general election in December 2019. Getty Images
Anti-Brexit activists protest outside the Houses of Parliament on January 9, 2020, the day Boris Johnson's Withdrawal Agreement Bill went through the commons after a vote. Getty Images
Pro-Brexit supporters celebrate as the UK exits the EU, at Parliament Square on January 31, 2020. Getty Images
David Frost and Michel Barnier begin formal negotiations on the future relationship between the EU and UK on March 2, 2020, in Brussels. Getty Images
Boris Johnson and Ursula von der Leyen meet for dinner on December 9, 2020, in Brussels. Getty Images
Lorries parked on the runway at Manston airport as they wait to cross the English Channel on December 22, 2020. France halted freight and passenger travel from the UK over concerns about surging Covid-19 cases. Getty Images
Ursula von der Leyen and Charles Michel attend a Brexit signature ceremony on December 30, 2020, in Brussels, after an agreement was reached. Getty Images
A man waves flags as he drives past Brexit supporters gathering in Parliament Square, in central London, on the day that the UK formally left the European Union - January 31, 2020. AFP
French fishing boats protest in front of the port of Saint Helier off the British island of Jersey to draw attention to what they see as unfair restrictions on their ability to fish in UK waters after Brexit, on May 6, 2021. AFP
Empty supermarket shelves are seen on July 23, 2021 in London. There were reports that some supermarkets had been emptying of fresh produce and household staples as Brexit lorry shortages combined with large numbers of staff isolating due to Covid-19 frustrated efforts to restock shelves. Getty Images
A man takes part in a driving lesson at the NDC heavy goods vehicle training centre on September 22, 2021 in Croydon, England. The combined forces of Brexit and Covid-19 created a severe shortage of HGV drivers in the UK. Getty Images
Anti-Brexit protesters wave the flags of the United Kingdom, Ireland and European Union outside Parliament on October 13, 2021. Getty Images
Protestors take part in a demonstration on November 20, 2021 in Newry, Northern Ireland, as fears grew that the UK government will trigger Article 16 which could see a return to a so called hard border. Getty Images
Then British prime minister David Cameron on his campaign bus in June 2016. Five years ago, British people voted in a referendum that was meant to bring certainty to the UK’s fraught relationship with its European neighbours. The decision on June 23, 2016 was narrow but clear: By 52 per cent to 48 per cent, they chose to leave the EU. AP photo.
David Cameron and his wife Samantha leave after casting their votes in the EU referendum at a polling station in London. AP Photo
Voters head to the polls on June 23, 2016 in Belfast, Northern Ireland. Getty Images
Nigel Farage, the leader of the UK Independence Party, celebrates and poses for photographers during a "Leave EU" party in London, in June 2016, after the voters chose to leave. AP Photo
Queen Elizabeth II welcomes Theresa May at an audience where she invited the former home secretary to become prime minister and form a new government, on July 13, 2016. Getty Images
After calling a snap general election in June 2017, Theresa May negotiated a deal between her party and Democratic Unionist Party to support a minority government. Getty Images
Theresa May and members of her Cabinet at the country retreat Chequers on July 6, 2018, where Ms May's new Brexit plans were agreed. Getty Images
Theresa May delivers a statement at Downing Street on November 14, 2018, after her Cabinet of senior ministers met and approved the wording of the draft Brexit agreement. Getty Images
Pro-EU campaigners stage a stunt outside Houses of Parliament involving a ship dubbed HMS Brexit on January 15, 2019 - the day MPs rejected May's Brexit plans in a vote. Getty Images
Then president of the European Council Donald Tusk and Theresa May at a round table meeting on April 10, 2019 in Brussels. The EU agreed to a flexible extension to Brexit until October 31. Getty Images
Theresa May outside 10 Downing Street on May 24, 2019 to announce that she would resign on June 7, 2019. Getty Images
Newly-elected Conservative party leader Boris Johnson poses outside the Conservative Leadership Headquarters on July 23, 2019. Getty Images
The Supreme Court rules that the prorogation of Parliament was unlawful on September 24, 2019. Britain's top court said that Prime Minster Boris Johnson acted unlawfully in August 2019 when he requested that the queen prorogue parliament for more than a month. Getty Images
With the campaign message 'Get Brexit Done' Boris Johnson wins a landslide general election in December 2019. Getty Images
Anti-Brexit activists protest outside the Houses of Parliament on January 9, 2020, the day Boris Johnson's Withdrawal Agreement Bill went through the commons after a vote. Getty Images
Pro-Brexit supporters celebrate as the UK exits the EU, at Parliament Square on January 31, 2020. Getty Images
David Frost and Michel Barnier begin formal negotiations on the future relationship between the EU and UK on March 2, 2020, in Brussels. Getty Images
Boris Johnson and Ursula von der Leyen meet for dinner on December 9, 2020, in Brussels. Getty Images
Lorries parked on the runway at Manston airport as they wait to cross the English Channel on December 22, 2020. France halted freight and passenger travel from the UK over concerns about surging Covid-19 cases. Getty Images
Ursula von der Leyen and Charles Michel attend a Brexit signature ceremony on December 30, 2020, in Brussels, after an agreement was reached. Getty Images
A man waves flags as he drives past Brexit supporters gathering in Parliament Square, in central London, on the day that the UK formally left the European Union - January 31, 2020. AFP
French fishing boats protest in front of the port of Saint Helier off the British island of Jersey to draw attention to what they see as unfair restrictions on their ability to fish in UK waters after Brexit, on May 6, 2021. AFP
Empty supermarket shelves are seen on July 23, 2021 in London. There were reports that some supermarkets had been emptying of fresh produce and household staples as Brexit lorry shortages combined with large numbers of staff isolating due to Covid-19 frustrated efforts to restock shelves. Getty Images
A man takes part in a driving lesson at the NDC heavy goods vehicle training centre on September 22, 2021 in Croydon, England. The combined forces of Brexit and Covid-19 created a severe shortage of HGV drivers in the UK. Getty Images
Anti-Brexit protesters wave the flags of the United Kingdom, Ireland and European Union outside Parliament on October 13, 2021. Getty Images
Protestors take part in a demonstration on November 20, 2021 in Newry, Northern Ireland, as fears grew that the UK government will trigger Article 16 which could see a return to a so called hard border. Getty Images