1. Must be a large enough class
Hunter - 500-600 people
Johnson - 13 women was enough because of a wide class.
2. Must prove special damage
You have suffered a higher level of damage. Must not be minor
Type of public interest
Obstruction of public highway
AG v Gastonia - large quantity of dust.
Wandsworth - Pigeons under bridge walkway was less convenient for those using it.
Dangers on the public highway
Danger on adjoining property. E.g. Sign sticks out over footpath
Defences and remedies
- Statutory authority
Same as private nuisance: