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A good place to start is Rachel Pistol's book Internment during the Second World War : a comparative study of Great Britain and the USA (2017.)
The Association of Jewish Refugees' oral history project 'Refugee Voices' has an entire section of refugees who were interned: https://www.ajrrefugeevoices.org.uk/refugee-internment.
You can search the USHMM Collections Search catalog, https://collections.ushmm.org, for more materials about internment in the UK.
Megan Lewis, reference librarian
United States Holocaust Memorial Museum