Sockets in Italy
Type CType FType L
Your the UK plugs don't fit the sockets used in Italy.
Italy from the UK is simple on voltage, with one Italian quirk on the plug. Italy uses round-pin Type C/F plus its own Type L sockets, none of which take the UK Type G, so you'll need an adapter. Voltage is the same 230V.
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No, Type G isn't used. Bring a Type C adapter.
No, both run on 230V.
Types C, F and L, at 230V / 50Hz.