According to a statement on the UK Government’s official website, as of January 1 the United Kingdom will cease participation in the European Galileo and European Geostationary Navigation Overlay Service(EGNOS) programs. British citizens and other private users are not affected, apparently: “devices that currently use Galileo and EGNOS, such as smart phones, will continue to be able to do so.”
The document, “Brexit transition: new rules for 2021,” states that the UK will “not use Galileo (including the future Public Regulated Service (PRS)) for defence or critical national infrastructure; have access to the encrypted Galileo Public Regulated Service; be able to play any part in the development of Galileo; be able to play any part in the development of EGNOS; be able to use the EGNOS SoL and EGNOSWorking Agreements (EWAs), which will no longer be recognised by the EU; be able to access or use EDAS.”