It means the funds available in your line of credit that you haven't used. For example, if you have a credit limit of £800 in your line of credit, and you've already drawn £200 to your bank account, you still have £600 available

Don't forget, you only pay interest on the money that you borrow, so you won't be charged for having money available that you haven't used.

When you first set up your account, we'll tell you what the limit is on your available credit line. Periodically, we'll review that limit to make sure it's appropriate and may increase it or decrease it. We'll give you 30 days' notice if we are planning to make any changes.