EU rules on social security coordination no longer apply to and in the United Kingdom as of 1 January 2021. However, the rights of persons covered by the Withdrawal Agreement concluded between the EU and the United Kingdom continue to be protected.

For persons not covered by the Withdrawal Agreement, social security coordination between the EU and the United Kingdom is regulated by the relevant Protocol to the Trade and Cooperation Agreement. While similar to EU rules and comprehensive in scope, the Protocol does not provide for an identical level of protection as the EU Regulations.