Almost by coincidence, I have been given the opportunity to take part in an unusually interesting archive material, namely a previously unknown private archive of Sweden's head of mission in London during the Second World War, the former CEO of SKF Björn G. Prytz. Access to both his formal, but during the war secret, correspondence with Foreign Office officials in Sweden and the correspondence with a large number of people who were part of his private network, both in England and in Sweden, provides opportunities to make a more in-depth analysis of Britain's actions against Sweden during the war. The relationship was certainly not unproblematic, as it was claimed in London that Swedish alignment with Germany went too far on several occasions. But the material also concretizes Prytz's other tasks and the many different issues and problems a Swedish envoy had to deal with. The aim of the study is to publish a book that can both provide new aspects of Anglo-Swedish relations during the Second World War and show how a prominent Swedish diplomat at this time worked with the support of an extensive personal network in both England and Sweden.