A group of activists has launched a campaign to replace every advert on London Underground with pictures of cats.
Citizens Advertising Takeover Service says the aim is to create a public space that makes us feel good, that's free of posters trying to get us to buy products.
C.A.T.S. is currently raising money for the project through a crowdfunding site and need £20,000 to carry out their plan on the platform of a small station.