I am 4 years into an IVA and live with my partner. We recently opened a joint bank account for some small business plans we had. It failed initially (no doubt because of my IVA) but Barclays allowed us to open a simple most basic account with just a cash card.
I am now looking through all my credit references with the 3 companies and see that I am 'linked (source barclays)' to my partner on CashCredit/Noddle.
It possibly could impact on her but any existing credit facilities will be fine. If she does have problems it is easily explained and should be nothing more serious than the odd hassle.