There's been a lot of confusing information surrounding the .EU domain and the rights of UK holders. Quite late in the day, any UK holders will have until 31 March 2021 to prove their right to own a .EU domain. After that date, if they've not complied, they will be notified failure to comply and the domain will be withdrawn. From 2022 the domain will become available for registration by EU citizens and businesses.
This looks like the final decision over compliance.
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zdnet.com...]