score:5
Regardless of what Italian laws say on this subject, in practice you won't be questioned by border guards as all EU citizens either go through automatic passport controls or get a quick glance at their passport from the staff manning the border. In addition, Italy cannot deny you entry as you're both their citizen and an EU citizen, so at worst you'll receive a stern lecture at the border.
Relax and enjoy your holiday.
Upvote:3
I don't see the problem. If you have a British passport that's it.
You don't need anything else to travel from UK to Italy.
It doesn't matter if you have italian citizenship or not, border police doesn't care as long as you have your British passport. (an italian ID card is a plus, but not required)
https://www.gov.uk/foreign-travel-advice/italy/entry-requirements