Thanks for all your advice. Sadly may not be able to use Barclays or any Lloyds TSB group company as they are 2 of my creditors.
Changed to First Direct & HSBC (as they are not creditors / linked with any of my existing creditors), for my current and business accounts respectively, prior to entering into the IVA. Now understand, from other feedback on this site, that it may be only a matter of time before they ask me to go if they rumble my new credit status. (Questioned my IP on this subject though, and he thought this was unlikely unless I told them, applied for an overdraft or went overdrawn).
In process of applying for new accounts with Co-Op just in case.
If that fails, I may try one of these basic 'CashPlus' basic current / business accounts, but some small fees involved with those.
Also there is a new independent high street bank (Metro Bank). Anyone used them? They claim to dispense with 'stupid' bank rules, and I have seen lots of positive internet chatter about them.
My opinions are just that: Based on my experience and being a self-employed IVA customer.