There is no time difference between London and Lisbon. Both cities use Western European Time (WET/WEST). When it's 12:00 PM in London, it's also 12:00 PM in Lisbon.
Both cities observe daylight saving time on the same schedule, so they remain synchronized year-round. Portugal chose to align with the UK timezone despite being geographically in line with Spain.
Any time works! Since both cities share the same timezone, you can schedule calls during standard business hours (9:00 AM - 5:00 PM) without any time conversion needed.
London and Lisbon are connected by direct flights taking about 2.5 hours. Lisbon has become a major European tech hub, attracting startups and digital nomads from the UK.