British Library
Official homepage of the country's biggest library.
http://www.bl.uk/

London Libraries
Discover London's public, academic and specialist libraries.
http://londonlibraries.org.uk/

The UK Public Libraries Page
Provides links to the websites of public libraries nationwide.
http://dspace.dial.pipex.com/town/square/ac940/weblibs.html

What's in London Libraries
This website allows you to search the collections and community information resources of a range of libraries, museums and archives throughout London.
http://www.londonlibraries.org.uk/will/