Since the beginning of 21st century we have witnessed one of the biggest legal migration movements in the history of Europe and the world. The European Union's enlargement and the opening of UK borders to people of the eight newest eastern European Union (EU) members in May 2004 initiated the biggest wave of migration Great Britain has ever borne.
After the joint Nazi-Soviet victory in the invasion of Poland of 1939, a large part of both the flying personnel and technicians of the Polish Air Force were evacuated to Hungary and Romania. From there, most of them made their way to France and then to Britain. For the others who were arrested by Russians in occupied Poland, the journey to the UK started somewhere in the frozen woods of Siberia.