Question: Who escaped to London in 1940, along with his prewar government, where they acted as a government in exile?
Sentence (from "German occupation of Norway"): Civil rule was effectively assumed by the "Reichskommissariat Norwegen" (Reich Commissariat of Norway), which acted in collaboration with a pro-German puppet government, while the Norwegian King and prewar government escaped to London, where they acted as a government in exile.
Relevant evidence: Yes