So it looks like we will be going back to the UK for retirement.
My wife is Swiss and I am British with Swiss nationality, we have investments and a portfolio with UBS and Pillar 1, 2 and 3 pensions.
When asked, our bank advisor was of the opinion that if we were no longer domiciled in CH we would have to close the account. Problem is “domiciled” can be quite nebulous /
So question is, has anyone managed to keep their Swiss bank account after having left the country. Given that everything operates online and correspondence is no longer posted it would be no problem to change our address to a friend/family in CH .
No it is not possible. You can't give relative's address as you will not be legally resident there, as far as I understand. There is no flexibility in where you are legally resident.
Will you ahve pensions from both countries? What will you do re Health Insurance?
It's possible with higher fees. Since it's about literal lifetime savings, banking fees should not be that high.
Problem with advisors is that they place people's cases in boxes. They never strive to look for alternatives. I'm almost sure that if you ask to UBS about an account for non-resident they'll give you the options and prices. But since you did not made that very specific question, the advisor did not say anything about it. It's almost like this people wear horse blinders in the office.
Your wife will have to continue paying Swiss health insurance (maybe you too unless your U.K. pension exempts you) but she will still get NHS treatment with it, not private.
Being a pleb doesn't necessarily mean you have money or not.
The UBS, nor any other bank for that matter don't really want to dick around for peanuts, it costs them more to keep the account.
For a non domiciled person there are various reporting that need to be done legally, ensure it is tax declared and conform so unless you have nice wedge coming in each month, it isn't worth their while.
Absolutely nothing to do with being British, or any other nationality for that matter, you seem to imply you were as pleb all on yourself with no prompting, although this is not a criteria, it is purely an economical reason as to whether you can hold an account as a non dom.