This may be because:
- The item has been reserved by somebody else.
- Your account is blocked because of large outstanding fines and/or very overdue books.
- You have renewed the item more than 99 times.
- You have outstanding university fees.
- Unseen renewals are not possible for one day loans, inter-library loans, equipment loans, or any of the laptop loans.
Please contact the Library help desk for more information.