The walls on the towpath of the Grand Union Canal between St Margaret's Way and Frog Island/Northgate Street are legal graffiti walls. As with all such places, graffiti etiquette is to be maintained, where you should only paint over an existing piece if the quality of your art is equal or will exceed the original piece.

Do not paint on the towpath outside of these areas, as graffiti is either forbidden or subject to other controls.