Yes, you can travel to Spain with a UK passport, but the requirements have changed significantly post-Brexit. As of 2026, UK citizens must ensure their passport was issued less than 10 years before the date of entry and is valid for at least three months after the intended day of departure. Under the Schengen Area rules, you can stay for up to 90 days in any 180-day period without a visa for tourism or business. However, a major update for 2026 is the implementation of the ETIAS (European Travel Information and Authorisation System). UK travelers now need to apply for this electronic authorization online before their trip. It costs €7 (though free for those under 18 or over 70) and is valid for three years. At the border, you can no longer use the EU fast-track lanes and must have your passport manually stamped or scanned through the new digital Entry/Exit System (EES) kiosks, which record your biometric data to track your stay duration automatically.