Oslo is 1 hour ahead of London. London uses GMT/BST while Oslo uses Central European Time (CET/CEST). When it's 12:00 PM in London, it's 1:00 PM in Oslo.
Both cities observe daylight saving time on the same schedule, so the 1-hour difference remains constant year-round.
Best calling time: 8:00 AM - 4:00 PM London time. This corresponds to 9:00 AM - 5:00 PM in Oslo, covering Norwegian business hours.
Oslo is Norway's capital and the center of its oil, shipping, and maritime industries. Direct flights from London take about 2 hours. Norway has strong trade relations with the UK, particularly in energy.