LONDON, ENGLAND - MARCH 25: The European Union flag flies over a statue of Winston Churchill and the Houses of Parliament at the Unite for Europe march on March 25, 2017 in London, United Kingdom. The British people voted to leave the European Union in a referendum in 2016. ( Ray Tang - Anadolu Agency )
LONDON, ENGLAND - MARCH 25: The European Union flag flies over a statue of Winston Churchill and the Houses of Parliament at the Unite for Europe march on March 25, 2017 in London, United Kingdom. The British people voted to leave the European Union in a referendum in 2016. ( Ray Tang - Anadolu Agency )
LONDON, ENGLAND - MARCH 25: Anti-Brexit supporters lay floral tributes to the victims of the London terror attack on March 22 in Parliament Square during a Unite for Europe march on March 25, 2017 in London, United Kingdom. The British people voted to leave the European Union in a referendum in 2016. ( Ray Tang - Anadolu Agency )
LONDON, ENGLAND - MARCH 25: Anti-Brexit supporters lay floral tributes to the victims of the London terror attack on March 22 in Parliament Square during a Unite for Europe march on March 25, 2017 in London, United Kingdom. The British people voted to leave the European Union in a referendum in 2016. ( Ray Tang - Anadolu Agency )
LONDON, ENGLAND - MARCH 25: Anti-Brexit supporters take part in the Unite for Europe march on March 25, 2017 in London, United Kingdom. The British people voted to leave the European Union in a referendum in 2016. ( Ray Tang - Anadolu Agency )
LONDON, ENGLAND - MARCH 25: Thousands of anti-Brexit supporters take part in the Unite for Europe march on March 25, 2017 in London, United Kingdom. The British people voted to leave the European Union in a referendum in 2016. ( Ray Tang - Anadolu Agency )
LONDON, ENGLAND - MARCH 25: Thousands of anti-Brexit supporters take part in the Unite for Europe march on March 25, 2017 in London, United Kingdom. The British people voted to leave the European Union in a referendum in 2016. ( Ray Tang - Anadolu Agency )
LONDON, ENGLAND - MARCH 25: Thousands of anti-Brexit supporters take part in the Unite for Europe march on March 25, 2017 in London, United Kingdom. The British people voted to leave the European Union in a referendum in 2016. ( Ray Tang - Anadolu Agency )
LONDON, ENGLAND - MARCH 25: Thousands of anti-Brexit supporters take part in the Unite for Europe march on March 25, 2017 in London, United Kingdom. The British people voted to leave the European Union in a referendum in 2016. ( Ray Tang - Anadolu Agency )
LONDON, ENGLAND - MARCH 25: Thousands of anti-Brexit supporters take part in the Unite for Europe march on March 25, 2017 in London, United Kingdom. The British people voted to leave the European Union in a referendum in 2016. ( Ray Tang - Anadolu Agency )
LONDON, ENGLAND - MARCH 25: Thousands of anti-Brexit supporters take part in the Unite for Europe march on March 25, 2017 in London, United Kingdom. The British people voted to leave the European Union in a referendum in 2016. ( Ray Tang - Anadolu Agency )