Quick removal is the best way to discourage retagging as taggers are looking for recognition. When tagging is left it's likely taggers will return, so you may need to remove graffiti repeatedly.
Full details about the law around graffiti legislation framework [PDF, 240 KB].
You can remove graffiti vandalism on your property. Contact the Council Graffiti Programme contacting us for assistance with limited range of paint colours and some help or advice on removing graffiti.