London is exactly 1 hour behind Brussels year-round. When it's 3:00 PM in Brussels, it's 2:00 PM in London. Both cities observe daylight saving time on the same schedule.
Belgium 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 Brussels. Full business day overlap.
Brussels is the de facto capital of the European Union, hosting the European Commission, Council, and Parliament. Post-Brexit, London-Brussels coordination on regulatory matters remains critical for many UK businesses.