MXP:
It is correct, that you will have to pay tax in Italy, but you can reclaim all the tax in the UK (Except for that part of your working time, spent in the UK)
If you spend 5% of your total working time (duty time) in the UK (Recurrent training etc) you will be able to reclaim 95% of your tax paid in the UK.
Tax rate in Italy is about the same as in the UK. And there are legal ways to recude your tax bill.
Itaq