From Brighton & Hove City Council:-
We’ve launched a consultation on our proposals to tackle graffiti and tagging in the city.
We’re only responsible for removing graffiti from our own buildings unless it’s offensive. But what about private buildings?
Please make sure you have your say:- https://consultations.brighton-hove.gov.uk/rubbish-recycling-and-streets/graffiti-removal-enforcement-consultation/