Polish cryptographers in England during WW2 were massively, massively vulnerable to coercion by Axis agents; they had family and friends in Axis-occupied Poland

Polish cryptographers in England during WW2 were massively, massively vulnerable to coercion by Axis agents; they had family and friends in Axis-occupied Poland, and the Axis powers were not at all squeamish about murdering Poles. Even that aside, it was impossible to do any kind of security review of them as all the information about them that was needed had either been destroyed by the German and Soviet invasion of Poland, or was in a records office in aforementioned Axis-occupied Poland. Considering Polish cryptographers in England a security risk wasn't sickening; it was sensible.