London is exactly 1 hour behind Zurich year-round. When it's 3:00 PM in Zurich, it's 2:00 PM in London. Both cities observe daylight saving time on the same schedule.
Switzerland uses Central European Time (CET/CEST) while the UK uses Greenwich Mean Time (GMT) and British Summer Time (BST). 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 Zurich. Full business day overlap.
Zurich and London are Europe's two largest financial centers. Swiss banks and London's financial institutions collaborate extensively, with many professionals commuting between these cities weekly.