Sunak’s pledge to “stop the boats” was plunged into jeopardy by the Supreme Court ruling. Five justices unanimously rejected the government’s appeal, stating there’s a real risk of refugees being returned from Rwanda to their home country. This matter is central to dealing with migration. A legal rule on refoulement means refugees must not be returned to their country of origin either directly or indirectly, if their life or freedom would be threatened in that country.