The Mayor of Oslo, Fabian Stang, has overseen the annual felling of a Norway spruce tree for Trafalgar Square. The tree is typically a 50- to 60-year-old tree, over 20 metres tall.
After the tree is cut, it is shipped to London by sea.
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.
More top news
Research into property prices has found London has more areas with an average price of more than £1m than anywhere else in the UK.
A permanent memorial will be unveiled today in memory of murdered Middleton soldier Lee Rigby.
The desk and chair where Charles Dickens sat to write his final novels have been bought for the nation using a national heritage grant.