I had a Nationwide savings account in my teens, it was a passbook, which I could use in some of the more advanced cash machines with a PIN number.
First current account I applied for when I was 16+1 day, apparently doing the application on the 16th birthday could sometimes cause issues with the application. That was my Nationwide cash card account.
Then my first current account was again with Nationwide. Supposedly it wasn’t possible to upgrade the cash card account to have a debit card, overdraft and cheque book, so it was a new account, and again it was the day after my 18th birthday due to the issue of computers supposedly not supporting applications on your birthday in all cases.
I still have the debit card current account. The cash card account I ended up switching over to another bank when the cashback on bills plus switching bonuses became a thing.
I currently have err 4 current accounts. Yeah don’t understand why people think you can only have one, but that is another discussion.