Hi,
I've been in the same situation as you for the last 5 years
1. You are able to earn something like £11500 each pa (2017/18) remembering to claim all expenses!
2 I think you will be better off just doing it through your own personal taxation........though remember you must fill it in whether you've earned or not.
3 it is a pain and an expense one as everytime you log into your account they send you out a
security code on your
phone.........this was costing £2 every time logged in to receive it on my PAYG mobile when it to the
Caribbean as O2 charge you everytime your
phone rings whether you answer it or not!! Maybe best have a sim card dedicated for tax so nothing else comes through.......though remember to claim all this against tax. I have spoken to HMRC and thereally seems no way around the code being sent.
If your girlfriend is with the Italian tax maybe see if it's better to for her to pay there though remember to split it so you both get maximum benefits.
To evade taxation our MPs seem to be the people to get
advice from, they seem experts on it along with Berlusconi!