Sir Ronald Hugh Campbell GCMG PC (27 September 1883 – 15 November 1953) was a British diplomat who held several important positions including that of British ambassador to France from July 1939 to 22 June 1940, when the armistice between Germany and France was signed at Compiègne.
[6] At Lisbon Campbell was instrumental in securing exit visas from Nazi-occupied Europe for Jewish Rabbis and their families, using the Red Cross and neutral diplomats to get the documents to those who needed them.
The visas allowed for entry into Portugal and were ostensibly for onward travel to the British colony of Mauritius but in effect allowed the refugees to travel across Europe ultimately to safety in Palestine.
He retired from the Foreign Office at the end of his period of service as British ambassador to Portugal in July 1945.[6][2].
At Lisbon, "a post of first importance", the obituarist recorded, "he gave invaluable services to his country...though much of his work has had necessarily to remain secret".