The document summarizes the migration of Eastern Europeans to the UK following the EU expansion in 2004. It states that over 600,000 people from the new EU countries had migrated to the UK by 2006, exceeding initial predictions of 15,000 migrants per year. The majority of these migrants came from Poland and Slovakia and found work in a variety of industries and locations throughout the UK. This influx contributed both economic and demographic impacts, with increases in births and in the working population, but also concerns about impacts on wages and community relations.