If you are concerned about someone you have seen sleeping rough in Norwich you can provide the information you have through Street Link.
Street Link is a national service that alerts local authorities and charities in England to when rough sleepers are reported in their area. It also allows rough sleepers to ask for help themselves.
The details you provide are sent to the local authority or outreach service for the area in which you have seen the person, to help them find the individual and connect them to support.