Material not on the open shelves is stored either on site or at the Depository in Egham. Areas to which readers are not permitted open access are designated the 'stack', which includes the Senate House tower as well as the offsite store.
To order items whose location in the catalogue is given as stack service igs stack, a book or periodicals order form has to be completed by the reader. The appropriate forms are available at the Circulation Desk on the fourth floor. Books and periodicals located on site are fetched by Library staff, and are usually available within an hour of the request being handed in.
Holdings tagged stack service (offsite store) has to be fetched from the Depository at Egham. A book or periodicals order form should be completed by the reader; appropriate forms are available at the Circulation Desk on the fourth floor. Material is retrieved from the store once a day Monday to Friday. Items requested are usually available within 24 to 48 hours of the order being placed. Readers coming from a distance are advised to check that the material requested is ready for collection before setting out on their journey.