Log in to your CreditLadder account: https://creditladder.co.uk/login, then go to Your bank > Change Bank > Update Bank Account, and follow the on-screen instructions.
Alternatively, while logged in, you can go directly to the page using the following link: https://creditladder.co.uk/dashboard/connect-bank?mode=change
This new bank should be where you are making your regular rent payments from.

