Have you used the Library's electronic Legal Deposit Terminal yet?
It provides access to electronic legal deposit material, i.e. resources deposited by UK & Irish publishers in a digital format. Please go to http://www.lib.cam.ac.uk/deptserv/legaldeposit/ld_access.html for more details.
LibarySearch finds records of such items (at the moment: primarily articles), but one needs to use a dedicated terminal at the UL, the Marshall Library, or any of affiliaed libraries, in order to access the full text. Currently you cannot print, save or cut & paste from these terminals at the University of Cambridge.
The Marshall Library's eLD terminal is located next to shelf 172, on the gallery/second floor level.