OK, so it took me a while, sorry.
For those of you in the UK who do not currently use the resources available for free via your library card, here is what you are missing.
Clipper DL:
"The Clipper DL Download service allows you to download and listen to over 600 audiobooks on your personal computer or portable media player."
Grove Arts Online:
"The most comprehensive online reference resource for all aspects of the visual arts worldwide from prehistory to the present day."
Grove Music Online:
"The world's premier authority on all aspects of music"
Newsbank:
"Search the Times, Guardian, Observer and Sunday Times from January 1998 and the Western Daily Press and the Bristol Evening Post from 1999 onwards."
Oxford Dictionary of National Biography:
"A collection of over 50,000 biographies of men and women who have shaped all aspects of British history, from early times to 2000."
Oxford Reference Online:
"Premium Collection is a vast online reference library available 24/7. It combines in-depth content offered by titles in the acclaimed Oxford Companions series with authoritative, quick-reference coverage of the full subject spectrum."
That is in addition to the OED.
I assume these are equally available via any UK library card, though I can only speak for my own service (South Gloucs).
As I write the following, I struggle to believe it is true... I have not investigated any of the above. Hmmm... Guess what I'm going to be doing this afternoon.
Tony