Born on 17^th May 1925 in Nérac, France, Berthoin joined the French Resistance at 15 during World War II, shaping his belief in European unity. After the war, he studied at the University of Grenoble and Harvard, focusing on law and philosophy. Berthoin’s career took a decisive turn in 1952 when he became the Head of Cabinet of Jean Monnet at the European Coal and Steel Community (ECSC).

One of Berthoin's most significant roles was his involvement in the UK’s relationship with Europe. Starting in 1956, Berthoin worked as the Deputy Head of the Delegation of the ECSC, then the European Communities to the United Kingdom. In 1970, he became EC’s Chief Representative to the UK and played a crucial role in the diplomatic work that ultimately resulted in the UK's accession to the European Economic Community (EEC) in 1973, during Edward Heath's administration.

Berthoin’s influence extended far beyond Britain’s entry into the EEC. In 1973, he resigned from his position as the EC’s Chief Representative in the UK but continued to advocate for greater international cooperation. He became a founding member and co-chair of the Trilateral Commission, an organisation aimed at fostering closer cooperation between Japan, North America, and Western Europe.

Georges Berthoin's life was dedicated to the cause of European unity. As one of the last witnesses to the birth of the European project, his passing marks the end of an era, but his vision for a united and peaceful Europe continues to live on. All of the staff of the EU delegation to the United Kingdom, as well as the many friends of the EU across the UK, pay homage to his visionary and inspiring work and to his precious legacy.