Best overlap: 9:00 AM to 6:00 PM in Lagos is 8:00 AM to 5:00 PM in Manchester.
Lagos and Manchester overlap from 9:00 AM to 6:00 PM (Lagos) to the equivalent 8:00 AM to 5:00 PM in Manchester — that's your meeting window. You won't be short on options — 9 hours of overlap leaves space for recurring syncs and ad-hoc calls alike. A quick caveat — Manchester's clocks move for daylight saving and Lagos's don't, so the times here are right for only part of the year.
London to New York is five hours apart, except for the five weeks a year when it isn't. Exact overlap windows for every US zone, the 2026 DST mismatch dates, and where to put the recurring sync. -