Two post-WWII landmarks in UK nationality and citizenship matters were in 1948 and 1971. The first welcomed British subjects from Commonwealth countries, particularly to help meet drastic labour shortages in key areas such as the new National Health Service. The 1962 and 1968 Commonwealth Immigrants' Acts were in part a reaction to public hostility and fear over immigration from certain countries and introduced limits and application requirements. The 1971 Act changed regulations, and partly helped to cause the later documentation problems for the offspring of the Windrush generation of citizens from 1948 and after.
In 1947 the Polish Resettlement Act (United Kingdom, 1947) acknowledged and took responsibility for the "Polish forces and refugees abroad" (Blaszczyk, 2017) who would not be able to return to Poland following the end of WWII. The Act "aimed to resettle political refugees in the UK, at a time when it was on the verge of an era of considerable population increase based largely on immigration." (Blaszczyk, 2017). Both Polish, other European, and people from Commonwealth or former Empire countries had fought for Britain and the Allied Forces during WWII. The Soviet takeover of Eastern Europe (the Iron Curtain and the Cold War) made return impossible for many of those from Poland and other countries now in the Soviet Bloc.
Free movement of people in the European Union and EU accession of new countries (particularly the 'A8' countries) in 2004, has made a difference to the migration landscape and population make-up and diversity of the UK. The Labour government's decision to allow full movement immediately was linked to reactions against those migrants and the policy of free movement (Consterdine, 2016) . The necessity and benefits of migration from EU27 countries, as from Commonwealth and other countries, have often been understated, and perceived pressures overplayed on the basis of little evidence. The Migration Observatory (2018) has a more balanced review of the effects of migration.
At the same time, it should be noted that 'free movement' - or reciprocal rights for all EU citizens - is a pillar of the EU and extends as much to any UK citizens wishing to live, work and settle in other member states (UK in a changing Europe, 2019), as long as the UK remains in the EU . Leaving the European Union removes these rights from British Citizens (Oluwole, 2018).
The UK and a Hostile Environment
The stated aim of UK governments after 2010 was reducing net migration to the tens of thousands. The Home Secretary till 2016, pursued multiple measures, with Immigration Acts of 2014 and 2016, which had far-reaching effects in the years to come (Bulman, 2019; Liberty, 2020) . The initial declaration of a "hostile environment for illegal migrants" was outlined in a Daily Telegraph interview with the then Home Secretary (Kirkup and Winnett, 2012). In the wake of the UK's departure from the EU, new immigration rules were introduced in a Bill in 2019.
Blaszczyk, A. (2017) 'The resettlement of Polish refugees after the second world war', Forced Migration Review, 54. Available at: https://www.fmreview.org/resettlement/blaszczyk (Accessed 08 July 2020)
Bulman, M. (2019) 'David Cameron: the prime mover behind Britain's hostile environment, who escaped the blame', The Independent, 9 June. Available at: https://www.independent.co.uk/news/uk/home-news/hostile-environment-david-cameron-theresa-may-windrush-scandal-immigration-a8916366.html (Accessed 10 June 2019)
Consterdine, E. (2016) 'The huge political costs of Blair's decision to allow Eastern European migrants unfettered access to Britain'. The Conversation, 16 November. Available at: https://theconversation.com/the-huge-political-cost-of-blairs-decision-to-allow-eastern-european-migrants-unfettered-access-to-britain-66077 (Accessed 7 June 2019).
Full Fact (2018) How immigration law changed for Commonwealth citizens. Available at: https://fullfact.org/immigration/how-immigration-law-changed-commonwealth-citizens/ (Accessed 7 June 2019)
Kirkup, J. and , R (2012) 'Theresa May interview: "We're going to give illegal migrants a really hostile reception". Daily Telegraph, 12 May. Available at: https://www.telegraph.co.uk/news//immigration/9291483/Theresa-May-interview-Were-going-to-give-illegal-migrants-a-really-hostile-reception.html (Accessed 7 June 2019)
Liberty (2020) Hostile Environment. Available at: https://www.libertyhumanrights.org.uk/fundamental/hostile-environment/ (Accessed 29 June 2020)
Migration Observatory (2018) The labour market effects of immigration. Available at: https://migrationobservatory.ox.ac.uk/resources/briefings/the-labour-market-effects-of-immigration/ (Accessed 12 June 2019)
Oluwole, F. (2018) Stopping freedom of movement cuts both ways. Available at: https://infacts.org/free-movement-cuts-both-ways/ (Accessed 10 June 2019)
The UK in a Changing Europe (2019) What does freedom of movement in the EU mean? Available at: https://ukandeu.ac.uk/fact-figures/what-is-freedom-of-movement/ (Accessed 10 June 2019)
United Kingdom (1947) Polish Resettlement Act 1947. Available at: http://www.legislation.gov.uk/ukpga/Geo6/10-11/19/contents (Accessed 08 July 2020)
United Kingdom (1948) British Nationality Act 1948. Available at: http://www.legislation.gov.uk/ukpga/Geo6/11-12/56/enacted (Accessed 10 June 2019)
United Kingdom (1962) Commonwealth Immigrants Act 1962. Available at: https://web.archive.org/web/20110927012831/http://www.britishcitizen.info/CIA1962.pdf (Accessed 26 June 2020)
United Kingdom (1968) Commonwealth Immigrants Act 1968. Available at: https://www.legislation.gov.uk/ukpga/1968/9/pdfs/ukpga_19680009_en.pdf (Accessed 26 June 2020)
United Kingdom (1971) Immigration Act 1971. Available at: https://www.legislation.gov.uk/ukpga/1971/77 (Accessed 10 June 2019)
United Kingdom (1981) British Nationality Act 1981. Available at: https://www.legislation.gov.uk/ukpga/1981/61/contents (Accessed 30 June 2020)