British Brexit Party leader Nigel Farage listens to U.S. President Donald Trump's State of the Union address to a joint session of the U.S. Congress in the House Chamber of the U.S. Capitol in Washington, U.S., February 4, 2020. REUTERS/Joshua Roberts

Britain's Brexit Party leader Nigel Farage leaves after U.S. President Donald Trump's State of the Union address to a joint session of the U.S. Congress in the House Chamber of the U.S. Capitol in Washington, U.S. February 4, 2020. REUTERS/Joshua Roberts

British Brexit Party leader Nigel Farage listens to U.S. President Donald Trump's State of the Union address to a joint session of the U.S. Congress in the House Chamber of the U.S. Capitol in Washington, U.S. February 4, 2020. REUTERS/Joshua Roberts

Brexit Party leader Nigel Farage speaks as people celebrate in Parliament Square on Brexit day in London, Britain January 31, 2020. REUTERS/Simon Dawson

Brexit Party leader Nigel Farage speaks as people celebrate in Parliament Square on Brexit day in London, Britain January 31, 2020. REUTERS/Simon Dawson

Brexit Party leader Nigel Farage speaks as people celebrate in Parliament Square on Brexit day in London, Britain January 31, 2020. REUTERS/Simon Dawson

Brexit Party leader Nigel Farage speaks as people celebrate in Parliament Square on Brexit day in London, Britain January 31, 2020. REUTERS/Simon Dawson

Brexit Party leader Nigel Farage walks as he celebrates Britain leaving the EU on Brexit day in London, Britain, January 31, 2020. REUTERS/Henry Nicholls

Brexit Party leader Nigel Farage speaks to the media through a fence as he celebrates Britain leaving the EU on Brexit day, at Parliament Square in London, Britain, January 31, 2020. REUTERS/Henry Nicholls

Brexit Party leader Nigel Farage speaks to a woman as they celebrate Britain leaving the EU on Brexit day in London, Britain, January 31, 2020. REUTERS/Henry Nicholls

A man raises his glass as Brexit Party leader Nigel Farage walks past as they celebrate Britain leaving the EU on Brexit day in London, Britain, January 31, 2020. REUTERS/Henry Nicholls

Brexit Party leader Nigel Farage gestures as he celebrates Britain leaving the EU on Brexit day in London, Britain, January 31, 2020. REUTERS/Henry Nicholls

Brexit Party leader Nigel Farage gestures as he celebrates Britain leaving the EU on Brexit day in London, Britain, January 31, 2020. REUTERS/Henry Nicholls

Brexit Party leader, Nigel Farage celebrates Britain leaving the EU on Brexit day in London, Britain January 31, 2020. REUTERS/Henry Nicholls

Brexit Party leader, Nigel Farage celebrates Britain leaving the EU on Brexit day in London, Britain January 31, 2020. REUTERS/Henry Nicholls

Brexit Party leader, Nigel Farage celebrates Britain leaving the EU on Brexit day in London, Britain January 31, 2020. REUTERS/Henry Nicholls

Brexit Party leader, Nigel Farage celebrates Britain leaving the EU on Brexit day in London, Britain January 31, 2020. REUTERS/Henry Nicholls

Brexit Party leader, Nigel Farage arrives in Parliament Square to celebrate Britain leaving the EU on Brexit day in London, Britain January 31, 2020. REUTERS/Henry Nicholls

Brexit Party leader, Nigel Farage arrives in Parliament Square to celebrate Britain leaving the EU on Brexit day in London, Britain January 31, 2020. REUTERS/Henry Nicholls

Brexit Party leader Nigel Farage leaves the European Parliament for the last time in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir

Brexit Party leader Nigel Farage speaks as he leaves the European Parliament for the last time in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir

Brexit Party leader Nigel Farage leaves the European Parliament for the last time in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir

Brexit Party leader Nigel Farage leaves the European Parliament for the last time in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir

Brexit Party leader Nigel Farage gestures as he leaves the European Parliament for the last time in Brussels, Belgium January 29, 2020. REUTERS/Johanna Geron

Brexit Party leader Nigel Farage speaks as he leaves the European Parliament for the last time in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir

Brexit Party leader Nigel Farage speaks as he leaves the European Parliament for the last time in Brussels, Belgium January 29, 2020. REUTERS/Johanna Geron

Brexit Party leader Nigel Farage speaks as he leaves the European Parliament for the last time in Brussels, Belgium January 29, 2020. REUTERS/Johanna Geron

Brexit Party leader Nigel Farage smiles as he leaves the European Parliament for the last time in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir

Brexit Party leader Nigel Farage speaks as he leaves the European Parliament for the last time in Brussels, Belgium January 29, 2020. REUTERS/Johanna Geron

Brexit Party leader Nigel Farage is hugged by Finnish MEP Laura Huhtasaari after a vote on the Withdrawal Agreement at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir

Brexit Party leader Nigel Farage holds a Union Jack flag after a vote on the Withdrawal Agreement at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir

Brexit Party leader Nigel Farage along with other MEPs wave British flags ahead of a vote on the Withdrawal Agreement at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Yves Herman

Brexit Party leader Nigel Farage along with other MEPs wave British flags ahead of a vote on the Withdrawal Agreement at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Yves Herman

Brexit Party leader Nigel Farage along with other MEPs wave British flags ahead of a vote on the Withdrawal Agreement at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Yves Herman

Brexit Party leader Nigel Farage waves a British flag ahead of a vote on the Withdrawal Agreement at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Yves Herman

Brexit Party leader Nigel Farage toasts ahead of a vote on the Withdrawal Agreement at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Yves Herman

Brexit Party leader Nigel Farage toasts ahead of a vote on the Withdrawal Agreement at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Yves Herman

Brexit Party leader Nigel Farage toasts ahead of a vote on the Withdrawal Agreement at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Yves Herman

Brexit Party leader Nigel Farage holds a Union Jack flag during a plenary session at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir

Brexit Party leader Nigel Farage holds a Union Jack flag during a plenary session at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir

Brexit Party leader Nigel Farage toasts ahead of a vote on the Withdrawal Agreement at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Yves Herman

Brexit Party leader Nigel Farage holds a Union Jack flag during a plenary session at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir

Brexit Party leader Nigel Farage toasts ahead of a vote on the Withdrawal Agreement at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Yves Herman

Brexit Party leader Nigel Farage speaks at a plenary session at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Yves Herman

Brexit Party leader Nigel Farage laughs during a plenary session at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Yves Herman

Brexit Party leader Nigel Farage smiles as he shows his socks during a plenary session at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir

Brexit Party leader Nigel Farage smiles as he shows his socks during a plenary session at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir TPX IMAGES OF THE DAY

Brexit Party leader Nigel Farage shows his socks during a plenary session at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir

Brexit Party leader Nigel Farage smiles as he shows his socks during a plenary session at the European Parliament in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir

Brexit Party leader Nigel Farage poses for a picture during the plenary session in memory of the victims of the Holocaust at the EU Parliament in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir

Brexit Party leader Nigel Farage attends a plenary session in memory of the victims of the Holocaust at the EU Parliament in Brussels, Belgium January 29, 2020. REUTERS/Yves Herman

Brexit Party leader Nigel Farage attends a plenary session in memory of the victims of the Holocaust at the EU Parliament in Brussels, Belgium January 29, 2020. REUTERS/Yves Herman

Brexit Party leader Nigel Farage attends a plenary session in memory of the victims of the Holocaust at the EU Parliament in Brussels, Belgium January 29, 2020. REUTERS/Yves Herman

Brexit Party leader Nigel Farage and other Members of the European Parliament attend a plenary session in memory of the victims of the Holocaust at the EU Parliament in Brussels, Belgium January 29, 2020. REUTERS/Yves Herman REFILE - CORRECTING ACTION

Brexit Party leader Nigel Farage speaks during a news conference ahead of a vote in the European Parliament on the Withdrawal Agreement in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir

Brexit Party leader Nigel Farage reacts during a news conference ahead of a vote in the European Parliament on the Withdrawal Agreement in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir

Brexit Party leader Nigel Farage gestures as he speaks during a news conference ahead of a vote in the European Parliament on the Withdrawal Agreement in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir

Brexit Party leader Nigel Farage reacts during a news conference ahead of a vote in the European Parliament on the Withdrawal Agreement in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir TPX IMAGES OF THE DAY

Brexit Party leader Nigel Farage speaks during a news conference ahead of a vote in the European Parliament on the Withdrawal Agreement in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir

Brexit Party leader Nigel Farage gestures as he speaks during a news conference ahead of a vote in the European Parliament on the Withdrawal Agreement in Brussels, Belgium January 29, 2020. REUTERS/Francois Lenoir