London is exactly 1 hour behind Barcelona year-round. When it's 3:00 PM in Barcelona, it's 2:00 PM in London. Both cities observe daylight saving time on the same schedule.
Spain uses Central European Time (CET) while the UK uses Greenwich Mean Time (GMT). The 1-hour difference remains constant throughout the year.
Any business hours work great! With only a 1-hour difference, 9:00 AM - 5:00 PM London corresponds to 10:00 AM - 6:00 PM Barcelona. Full business day overlap.
Barcelona is a popular destination for British tourists and expats. The 2-hour flight makes weekend trips common, and many British companies have operations in Barcelona's thriving tech and startup scene.