You can pay Library charges online via your Library Account.
Please be aware that books are now automatically renewed unless they are reserved by someone else. If someone reserves a book that you have, you will be sent a recall notice to your Unimail email address. The notice will tell you the date the book needs to be returned by. Items returned late will incur a replacement cost charge.
You'll temporarily lose your borrowing rights if items are not returned, and you have more than £30 owing on your account.
You can find more information on Library charges here