What is donated by Norway every year and put in Trafalgar square London?

Every year, Norway donates a Christmas tree to London, specifically placing it in Trafalgar Square. This tradition began in 1947 as a gesture of gratitude for Britain's support to Norway during World War II. The tree is typically a large Norway spruce and is adorned with lights, becoming a central feature of the city's holiday celebrations. The lighting ceremony is often attended by local dignitaries and marks the official start of the Christmas season in London.