British citizens / UK nationals now have to follow the same process as other non-EU national citizens of third countries to get Spanish residency, i.e. there is a requirement to first obtain a visa.

The financial means required for a British Citizen / UK national to obtain a residency visa, is a lot higher than it was when the UK was in the EU.  A single applicant needs to have around €30k per year in either income or savings, whereas a citizen of an EU country €6k is sufficient.

British nationals also have to obtain a police criminal report, get official supporting documents legalised, and medical certificates are also required for most visa applications.

Spain’s Digital Nomad Visa and Residency is now nearly two years old and has become the second most popular Spanish residency after the Non-Lucrative Visa.  This visa or residency permit allows the holder to live in Spain and work remotely or online.  It can be applied directly in Spain, or via the Spanish Consulate in the country in which you currently reside.