User guide - Pay as you go
A copy of the 'User Guide' can be downloaded here.
We use cookies to ensure that we give you the best experience on our website. If you accept without changing your settings, we'll assume that you are happy to receive all cookies on this website. However, if you would like to, you can change your cookie settings at any time, you can also change your preferences below by clicking on the change my preferences button or view our privacy policy for more information.