British Union Jack flag and European Union flag are displayed by demonstrators next to the statue of Charlotte, Grand Duchess of Luxembourg, during the visit of British Prime Minister Boris Johnson in Luxembourg, September 16, 2019. REUTERS/Yves Herman

MEDEF Chairman Geoffroy Roux de Bezieux and Luxembourg's Grand Duchess Maria Teresa attend the MEDEF union summer forum renamed La Rencontre des Entrepreneurs de France, LaREF, at the Paris Longchamp racecourse in Paris, France, August 29, 2019. REUTERS/Benoit Tessier

MEDEF Chairman Geoffroy Roux de Bezieux and Luxembourg's Grand Duchess Maria Teresa attend the MEDEF union summer forum renamed La Rencontre des Entrepreneurs de France, LaREF, at the Paris Longchamp racecourse in Paris, France, August 29, 2019. REUTERS/Benoit Tessier

MEDEF Chairman Geoffroy Roux de Bezieux and Luxembourg's Grand Duchess Maria Teresa attend the MEDEF union summer forum renamed La Rencontre des Entrepreneurs de France, LaREF, at the Paris Longchamp racecourse in Paris, France, August 29, 2019. REUTERS/Benoit Tessier

Luxembourg's Grand Duchess Maria Teresa attends the MEDEF union summer forum renamed La Rencontre des Entrepreneurs de France, LaREF, at the Paris Longchamp racecourse in Paris, France, August 29, 2019. REUTERS/Benoit Tessier

Luxembourg's Grand Duchess Maria Teresa attends the MEDEF union summer forum renamed La Rencontre des Entrepreneurs de France, LaREF, at the Paris Longchamp racecourse in Paris, France, August 29, 2019. REUTERS/Benoit Tessier

Luxembourg's Grand Duchess Maria Teresa attends the MEDEF union summer forum renamed La Rencontre des Entrepreneurs de France, LaREF, at the Paris Longchamp racecourse in Paris, France, August 29, 2019. REUTERS/Benoit Tessier

MEDEF Chairman Geoffroy Roux de Bezieux and Luxembourg's Grand Duchess Maria Teresa attend the MEDEF union summer forum renamed La Rencontre des Entrepreneurs de France, LaREF, at the Paris Longchamp racecourse in Paris, France, August 29, 2019. REUTERS/Benoit Tessier

Hereditary Grand Duchess Stephanie of Luxembourg listens to Archbishop Jean-Claude Hollerich at the reception at Grand Ducal Palace after the funeral of Grand Duke Jean in Luxembourg May 4, 2019. Sophie Margue/Pool via REUTERS

Maria Teresa, Grand Duchess of Luxembourg chats at the reception at Grand Ducal Palace after the funeral of Grand Duke Jean in Luxembourg May 4, 2019. Sophie Margue/Pool via REUTERS

Maria Teresa, Grand Duchess of Luxembourg chats at the reception at Grand Ducal Palace after the funeral of Grand Duke Jean in Luxembourg May 4, 2019. Sophie Margue/Pool via REUTERS

Luxembourg Grand Duke Henri and Grand Duchess Maria Teresa attend the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. Sophie Margue/Pool via REUTERS

Luxembourg Grand Duke Henri and Grand Duchess Maria Teresa attend the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. Sophie Margue/Pool via REUTERS

Luxembourg's Hereditary Grand Duke Guillaume, Hereditary Grand Duchess Stephanie and Duke Guillaume leave after attending the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Luxembourg's Grand Duke Henri and Grand Duchess Maria Teresa leave after attending the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Luxembourg's Grand Duke Henri and Grand Duchess Maria Teresa leave after attending the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Luxembourg's Grand Duke Henri and Grand Duchess Maria Teresa leave after attending the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Luxembourg's Grand Duke Henri and Grand Duchess Maria Teresa leave after attending the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Luxembourg's Grand Duke Henri and Grand Duchess Maria Teresa leave after attending the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Luxembourg Grand Duke Henri and Grand Duchess Maria Teresa attend the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. Sophie Margue/Pool via REUTERS

Luxembourg Grand Duke Henri, Grand Duchess Maria Teresa and other members of the family follow the hearse of Luxembourg's Grand Duke Jean as they leave Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Luxembourg's Grand Duke Henri, Grand Duchess Maria Teresa and other members of Grand Ducal Family leave the Notre-Dame Cathedral following pallbearers carrying the coffin Luxembourg's Grand Duke Jean in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Luxembourg Grand Duke Henri, Grand Duchess Maria Teresa and other members of the family follow the hearse of Luxembourg's Grand Duke Jean as they leave Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Luxembourg's Grand Duke Henri, Grand Duchess Maria Teresa and other members of Grand Ducal Family leave the Notre-Dame Cathedral following pallbearers carrying the coffin Luxembourg's Grand Duke Jean in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Luxembourg Grand Duke Henri and Grand Duchess Maria Teresa follow the hearse of Luxembourg's Grand Duke Jean as they leave Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Luxembourg Grand Duke Henri and Grand Duchess Maria Teresa attend the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. Guy Wolff/Pool via REUTERS

Luxembourg's Hereditary Grand Duke Guillaume and Hereditary Grand Duchess Stephanie follow the hearse during the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Luxembourg Grand Duke Henri and Grand Duchess Maria Teresa follow the hearse during the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Luxembourg's Grand Duke Henri, Grand Duchess Maria Teresa and other members of Grand Ducal Family wait as pallbearers carry the coffin Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Pallbearers carry the coffin of Luxembourg's Grand Duke Jean while Luxembourg's Grand Duke Henri, Grand Duchess Maria Teresa and other members of Grand Ducal Family pay respect at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Luxembourg Grand Duke Henri, Grand Duchess Maria Teresa and other members of Grand Ducal Family follow the hearse during the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Pallbearers carry the coffin of Luxembourg's Grand Duke Jean while Luxembourg's Grand Duke Henri, Grand Duchess Maria Teresa and other members of Grand Ducal Family pay respect at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Luxembourg Grand Duke Henri, Grand Duchess Maria Teresa and other members of Grand Ducal Family follow the hearse during the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Luxembourg Grand Duke Henri, Grand Duchess Maria Teresa and other members of Grand Ducal Family follow the hearse during the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Luxembourg's Grand Duke Henri and Luxembourg's Grand Duchess Maria Teresa attend the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Pallbearers carry the coffin of Luxembourg's Grand Duke Jean while Luxembourg Grand Duke Henri, Grand Duchess Maria Teresa and other members of Grand Ducal Family pay respect at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. REUTERS/Francois Lenoir

Britain's Prince Charles and Camilla, Duchess of Cornwall attend a cultural celebration at Pedro's Castle in Grand Cayman, March 28, 2019. REUTERS/Phil Noble

Britain's Prince Charles and Camilla, Duchess of Cornwall attend a cultural celebration at Pedro's Castle in Grand Cayman, March 28, 2019. REUTERS/Phil Noble

Britain's Prince Charles and Camilla, Duchess of Cornwall attend a cultural celebration at Pedro's Castle in Grand Cayman, March 28, 2019. REUTERS/Phil Noble

People welcome Britain's Prince Charles and Camilla, Duchess of Cornwall a cultural celebration at Pedro's Castle in Grand Cayman, March 28, 2019. REUTERS/Phil Noble

Britain's Prince Charles and Camilla, Duchess of Cornwall attend a cultural celebration at Pedro's Castle in Grand Cayman, March 28, 2019. REUTERS/Phil Noble

Britain's Prince Charles and Camilla, Duchess of Cornwall attend a cultural celebration at Pedro's Castle in Grand Cayman, March 28, 2019. REUTERS/Phil Noble

Britain's Prince Charles and Camilla, Duchess of Cornwall attend a cultural celebration at Pedro's Castle in Grand Cayman, March 28, 2019. REUTERS/Phil Noble

Britain's Prince Charles and Camilla, Duchess of Cornwall attend a cultural celebration at Pedro's Castle in Grand Cayman, March 28, 2019. REUTERS/Phil Noble

Britain's Prince Charles and Camilla, Duchess of Cornwall attend a cultural celebration at Pedro's Castle in Grand Cayman, March 28, 2019. REUTERS/Phil Noble

A guest arrives for a reception at Pedro's Castle before Britain's Prince Charles and Camilla, Duchess of Cornwall in Grand Cayman, March 28, 2019. REUTERS/Phil Noble

A guest arrives for a reception at Pedro's Castle before Britain's Prince Charles and Camilla, Duchess of Cornwall in Grand Cayman, March 28, 2019. REUTERS/Phil Noble

A guest arrives for a reception at Pedro's Castle before Britain's Prince Charles and Camilla, Duchess of Cornwall in Grand Cayman, March 28, 2019. REUTERS/Phil Noble

Britain's Camilla, Duchess of Cornwall poses with the school choir, during her visit to Georgetown Primary School in Grand Cayman, Cayman Islands March 28, 2019. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall poses with the school choir, during her visit to Georgetown Primary School in Grand Cayman, Cayman Islands March 28, 2019. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall poses with the school choir, during her visit to Georgetown Primary School in Grand Cayman, Cayman Islands March 28, 2019. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall is presented with books, during her visit to Georgetown Primary School in Grand Cayman, Cayman Islands March 28, 2019. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall is presented with a posy by a student, during her visit to Georgetown Primary School in Grand Cayman, Cayman Islands March 28, 2019. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall visits Georgetown Primary School in Grand Cayman, Cayman Islands March 28, 2019. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall visits Georgetown Primary School in Grand Cayman, Cayman Islands March 28, 2019. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall visits Georgetown Primary School in Grand Cayman, Cayman Islands March 28, 2019. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall visits Georgetown Primary School in Grand Cayman, Cayman Islands March 28, 2019. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall meets school children during her visit to Georgetown Primary School in Grand Cayman, Cayman Islands March 28, 2019. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall meets school children during her visit to Georgetown Primary School in Grand Cayman, Cayman Islands March 28, 2019. Chris Jackson/Pool via REUTERS

Britain's Camilla, Duchess of Cornwall meets school children during her visit to Georgetown Primary School in Grand Cayman, Cayman Islands March 28, 2019. Chris Jackson/Pool via REUTERS