Trafalgar Square Authority in conjunction with the charity Unicef, who began ticketing the event to control crowd numbers. A Christmas ceremony has been held in the square every year since 1947. A Norway spruce (or sometimes a fir) is presented by Norway's capital city, Oslo as London's Christmas tree, a token of gratitude for Britain's support during World War II. (Besides war-time support, Norway's Prince Olav and the country's government lived in exile in London throughout the war.) The Christmas tree is decorated with lights that are switched on at a seasonal ceremony. It is usually held twelve days before Christmas Day.
Trafalgar Square Christmas tree Felixstowe free of charge by a cargo ship of the Fred Olsen Line. As of at least 2007, the tree was shipped across the North Sea to Immingham by DFDS Tor Line. As of 2018, it has been the responsibility of Radius Crane Management Ltd. to transport, guard and erect the tree in Trafalgar Square. The Trafalgar Square tree is decorated in a traditional Norwegian style and adorned with 500 white lights. In 2008, the tree utilised low-wattage halogen bulbs which used 3.5 kW of power. At the base of the tree stands a plaque, bearing the words: "This tree