Hi Jif100 Milan,
Please download and complete the form DT individual pdf:
Double Taxation Treaty Relief - DT Individual
If your local government pension is not taxable in the UK, then complete the form including this pension as well as your State Pension.
Please send the completed, signed and dated form to the Italian tax authorities.
They will validate the form and return it to you.
You in turn, will need to send the form to HMRC at the address on page 1 of the form.
My colleagues will be able to issue a 'NT (no tax) tax code to your pension provider, so any tax they have deducted, is refunded.
Thank you.