Should the UK leave the EU without a deal, or should a deal be agreed that does not include a provision for .eu ownership by UK entities, it’s highly likely that the EU will revoke any .eu domain names unless you can provide an EU address. While this won’t happen immediately after Brexit, this is something to bear in mind for the coming months.
The situation, as with anything Brexit related, remains uncertain at this time. We will continue to monitor the situation and notify you accordingly. You can find a full statement from the .eu domain registry here.