Keywords: Polish people History 20th century ; Balts (Indo-European people) History 20th century ; Political refugees History 20th century ; Immigrants History 20th century ; Poles Great Britain ; History ; 20th century ; Balts Indo-European people Great Britain ; History ; 20th century ; Political refugees Great Britain ; History ; 20th century ; Immigrants Great Britain ; History ; 20th century ; Baltic Sea Region Emigration and immigration ; History ; 20th century ; Poland Emigratation and immigration ; History ; 20th century ; Great Britain Ethnic relations ; History ; 20th century ; Sowjetunion ; Polen ; Politische Verfolgung ; Balten ; Deutschland ; Geschichte 1939-1945 ; Deutschland ; Sowjetunion ; Polen ; Balten ; Politische Verfolgung ; Geschichte 1939-1945 ; Großbritannien ; Polen ; Balten ; Politischer Flüchtling ; Geschichte 1939-1945 ; Großbritannien ; Polen ; Balten ; Soziale Integration ; Geschichte 1939-2004