Title: Trafalgar Square Christmas tree
Content:   The Trafalgar Square Christmas tree is a Christmas tree gifted to the people of Britain by Norway each year since 1947. The tree is prominently displayed in Trafalgar Square from the beginning of December until 6 January.
Title: Trafalgar Square Christmas tree
Content:  As of 2018, it has been the responsibility of Radius Group, 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 is given by the city of Oslo as a token of Norwegian gratitude to the people of London for their assistance during the years 1940-45. A tree has been given annually since 1947."
Title: Trafalgar Square Christmas tree
Content:  The Trafalgar Square Christmas tree is typically a 50- to 60-year-old Norway spruce, generally over 20 metres tall. The tree is cut in Norway some time in November during a ceremony attended by the British Ambassador to Norway, Mayor of Oslo, and Lord Mayor of Westminster. After the tree is cut, it is shipped to the UK by boat across the sea. At one time it was shipped to 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 
Title: Trafalgar Square Christmas tree
Content:  The tree lighting ceremony in Trafalgar Square takes place on the first Thursday in December and is attended by thousands of people. The ceremony, led by the Lord Mayor of Westminster, includes a band and choir followed by the switching on of the Christmas lights. Traditionally, the tree provides a focal point for Christmas carolling groups. For many in London, the tree and the accompanying carolling signals the countdown to Christmas. Since 2009, the Poetry Society has commissioned new poems annually for display on banners around the base of the tree. In 2010, schoolchildren also performed one of the poems at the lighting-up ceremony.
Title: Trafalgar Square Christmas tree
Content:  The Trafalgar Square Christmas tree has been an annual gift to the people of Britain from Norway as a token of gratitude for British support to Norway during the Second World War. The first tree was cut down by Mons Urangsvåg in 1942 during a raid on the Norwegian island called Hisøy. Hisøy Island is located on the west coast between Bergen and Haugesund. After it was cut down, the tree was then transported to England where the Norwegian King was in exile, and given to him as a gift. It is possible to visit the island of Hisøy but only by boat, and from the old tree stump, a new tree has since grown. The tree has provided a central focus for the Trafalgar Square traditional carol-singing programme, performed by different groups raising money for voluntary or charitable organisations. The tree remains until just before the Twelfth Night of Christmas, when it is taken down for recycling. The tree is chipped and composted, to make mulch.
Title: Trafalgar Square
Content:   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. The festivity is open to the public and attracts a large number of people. The switch-on is usually followed by several nights of Christmas carol singing and other performances and events. On the twelfth night of Christmas, the tree is 
Title: Trafalgar Square
Content:  down for recycling. Westminster City Council threatened to abandon the event to save £5,000 in 1980 but the decision was reversed. The tree is selected by the Head Forester from Oslo's municipal forest and shipped, across the North Sea to the Port of Felixstowe, then by road to Trafalgar Square. The first tree was 48 ft tall, but more recently has been around 75 ft. In 1987, protesters chained themselves to the tree. In 1990, a man sawed into the tree with a chainsaw a few hours before a New Year's Eve party was scheduled to take place. He was arrested and the tree was repaired by tree surgeons who removed gouged sections from the trunk while the tree was suspended from a crane.
Title: Observance of Christmas by country
Content:  In the United Kingdom Christmas decorations are put up in shops and town centres from early November. Many towns and cities have a public event involving a local or regional celebrity to mark the switching on of Christmas lights. Decorations in people's homes are commonly put up from early December, traditionally including a Christmas tree, cards, and lights both inside and outside the home. Every year, Norway donates a giant Christmas tree for the British to raise in Trafalgar Square as a thank you for helping during the Second World War. Christmas carolers at Trafalgar Square in London sing around the tree 
Title: Christmas tree
Content:  has also often been associated with the end of hostilities. After the signing of the Armistice in 1918 the city of Manchester sent a tree, and £500 to buy chocolate and cakes, for the children of the much-bombarded town of Lille in northern France. In some cases the trees represent special commemorative gifts, such as in Trafalgar Square in London, where the City of Oslo, Norway presents a tree to the people of London as a token of appreciation for the British support of Norwegian resistance during the Second World War; in Boston, where the tree is a gift from 
Title: Halifax Explosion
Content:  Tree Producers Association, which began an annual donation of a large tree to promote Christmas tree exports as well as acknowledge Boston's support after the explosion. The gift was later taken over by the Nova Scotia Government to continue the goodwill gesture as well as to promote trade and tourism. The tree is Boston's official Christmas tree and is lit on Boston Common throughout the holiday season. In deference to its symbolic importance for both cities, the Nova Scotia Department of Natural Resources has specific guidelines for selecting the tree and has tasked an employee to oversee the selection.

Question: who donates a christmas tree to trafalgar square?
Answer: Oslo, Norway.