British cinema newsreel library covering British Movietone News in its entirety from 1929-1979. Online database is fully searchable (the database also includes the TV-AM library) with detailed shotlists available. All its issues can now be viewed online via QuickTime and requires registration, which is free.
In 2015 the entire archive was published on a Movietone YouTube channel by AP Archive making thousands of news stories freely available to browse, share and embed. Note: Much of the metadata has been stripped out (for example release date and issue number) making a search for a specific event more difficult.