As a citizen of Italy you are not required to apply for visa to study, work and live in the UK permanently or temporarily.
Anyone from Italy wishing to study in the UK is not required to obtain a Student visa before commencing any course.
An Ancestry visa allows those with a UK-born grandparent to live and work in the UK.
I am not from Italy: UK Family Visa Assessment
UK Citizens and Residents in Italy who require consular services can contact the UK Embassy in Italy through the contact details listed below: