The patrol service operates regular inspection visits by G4S patrol units to the sites being guarded. A full record is kept of the state of the site after each visit.
If there is any sign of damage at the site or if there is any risk of damage occurring, then the patrol unit will notify the G4S Alarm Response Centre of it and start continuous surveillance of the site. The owner of the property is notified immediately and the police and the rescue services are also notified if necessary. The G4S patrol unit remain at the site until the owner of the property arrives.
For the patrol service operated for local governments, G4S patrol units patrol a town or district to uphold public order and safety.