An artwork that appeared in Melbourne's iconic Hosier Lane yesterday reported to be a Banksy original has been denounced as "a blatant attempt to garner publicity" for a controversial, unauthorised exhibition opening in Melbourne tomorrow.

Jo Brooks, the famous street artist's London-based publicist, told Crikey in an email that the artwork, as well as an accompanying video that purports to have caught Banksy on camera escaping the scene, is "totally fake and it a blatant attempt to garner publicity for an unauthorised show". The artwork is a picture of Pauline Hanson wearing a T-shirt bearing the slogan "Fuck off, we're fools" (a play on the "Fuck Off We're Full" T-shirts).