Is Trafalgar Square's Christmas tree looking thinner than usual?

The Trafalgar Square Christmas tree has arrived in London, but some people are concerned it is looking a little thinner than usual.

Pictures show the branches of the 21-metre Norwegian Spruce looking a bit more sparse than usual, with one person labelling it the "most anaemic tree possible".

The famous tree is around 90-years-old and was given to Britain by Norway as a thank you for support during the Second World War. The tradition has been ongoing since 1947.

The tree is chopped down in Norway at the end of November, from a PEFC certified forest, before being transported to London via boat and lorry.

The Christmas tree in Trafalgar Square after being put up on Wednesday (left) and the tree after being put up in December 2014

The lights are switched on the first Thursday in December, with crowds encouraged to gather around the tree at 6pm.