Anglia Plus - Bus validity in Norwich

[TurbostarFan]

I have heard of the Anglia Plus ticket sold by Greater Anglia, from their website it is valid on any First Bus service in Norwich. However this is ambiguous. Does anyone know if this literally means the city of Norwich or does it mean the First Group Norwich fare zone? Copies of the First Group bus fare zones are available here: https://www.firstgroup.com/norfolk-suffolk/routes-and-maps/fare-zone-maps

 

[TurbostarFan]

Updaet: I have contacted First Group and Bus Users. First Group informed me that this applies to "Norwich", which presumably means the entire "Network Norwich" zone.

 

[RT4038]

I should think it means the Plus Bus zone as shown in http://www.plusbus.info/sites/default/files/pdfs/Norwich 1.pdf