High resolution DNA analysis . Here are five facts about migration into and out of the UK: 1 The UK has the fifth-largest immigrant population in the world, at 8.5 million. In 2019 the number of irregular migrants, who do not come through . No. Where Britain's immigrants historically come from - Statista This is the case of the United Kingdom, which had 8.4 million immigrants and 4.7 . Britain has most illegal immigrants in the EU | News | The Times Also among the top ten largest source countries were El . Many The International Passenger Survey (IPS) is a rolling survey of passengers entering and leaving the UK. Next >>. The claim in the Pew paper is simple: there may have been between 800,000 and 1.2 million unauthorised migrants living in the UK in 2017. 5 facts about migration and the United Kingdom - Pew Research Center Some came over legally but become illegal due to changes in the law. South Africa and Kenya. Where Do US Immigrants Come From? Map of Most Common Countries About half of non-EU-born migrants in the UK said they came to the country for family reasons in 2019, while the most common reason for migration among EU migrants was work. Various estimates suggest that the periods with the most asylum grants were when: Around 80,000 Jewish refugees came to the UK between 1933 and 1939, equivalent to around 11,000 per year. Since 1945, immigration to the United Kingdom under British nationality law has been significant, in particular from the Republic of Ireland and from the former British Empire, especially India, Bangladesh, Pakistan, the Caribbean, South Africa, Nigeria, Ghana, Kenya, and Hong Kong. The most common reason non-British citizens reported for coming to the UK in 2016 was work.