Singer and X-Factor star, Fleur East and Violet Sellers from Camden were joined by Met Police Commissioner, Sir Bernard Hogan-Howe to launch a charity event to ensure that thousands of children in care across the capital receive a special Christmas present this year.
Violet, aged 9, was this year winner of the Met's Christmas Tree Campaign poster design competition. She designed a cheerful snowman wearing a police hat with the slogan: Every child deserves a gift!
Her design was chosen from over 4,000 poster designs from children across the capital.
The Met's 'Christmas Tree Project' is spreading its cheer across London, with trees being lit up by officers outside police stations and in other public places in all of London's 32 boroughs to ensure more children in need have a present delivered to them in time for Christmas Day.
How you can give a gift: Londoners are encouraged to get behind the campaign and give a gift by taking a tagged ribbon from a tree on your borough or at Hyde Park police station, and following the instructions on the tag.
You can also visit the online virtual Met Christmas tree athttp://www.met.police.uk/christmastree
In addition this year, members of the public can also donate money if they are unable to buy a gift by visiting the Just Giving webpage at:
Last year's event resulted in 11,360 gifts given to children across London. The Commissioner was inspired to launch the appeal in London in 2012 after seeing a similar concept in Sheffield 30 years ago.
The lights were turned on outside the Hyde Park police station - the tree's temporary home before the opening of the Met's new HQ on Victoria Embankment in the New Year.