An artist tried to lift the February gloom by releasing more than 2,000 pink smiley faces into the air over London.

The Happy Cloud installation filled the air outside the Tate Modern gallery with the faces, made from helium, soap and vegetable dye.

The artist, 28-year-old Stuart Semple, said he wanted to create something that would cheer people up.

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This is the kind of art that I like. If I saw this, it would definitely put a smile on my face. :)