Willesden Green tube station is being transformed into "a wild woodland" in a bid to get people to dispose of their chewing gum more responsibly.
Commuters have been treated to the sight of mosses, ferns, toadstools and even birch trees as the anti-gum littering campaign hopes to give them "something to chew on".
The Chewing Gum Action Group said the venture is the UK’s "first tube station surrounded by a pop up woodland", and named it "the Gum Forest".
Though the Gum Forest will remain at Willesden Green for just one day, it will them be divided between Brent’s community gardens and live on there.
You can click here for more information on the project.