There will be no change to the rights and status of EU, EEA, and Swiss citizens currently lawfully living in the UK on or before 31 December 2020.

If you're living in the UK by 31 December 2020, you can continue to apply for a pre or settled status until 30 June 2021.
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If you choose to come for work or studies to the UK as an EU citizen on or after 1 January 2021, you may need to apply for a visa.