Right now there are no duties between Italy and the UK. The UK is still in the EU until December 31. After that date it is possible (many consider it likely) that there will be no duties anyway and they will find some sort of agreement. Otherwise, the duties with Canada give more or less an idea of how much it could be
Don’t count on it.
For example - Certain glass vases have a 30% duty into the US. Those same glass vases have zero duty into Canada. That is a real life example from my work.