Robin Alston's Library History - The British Isles - To 1850 (archived copy) provides "a comprehensive series of files covering libraries, institutional, commercial and private in the British Isles from the late medieval period to the year 1850".
The Victorian Web covers many aspects of nineteenth century life including Biography, History, Politics, Gender, Philosophy, Religion, Science, Technology, Literature, Visual Arts and Victorian Design.
The Heritage Trail (archived copy) - "One of his sceptred isle's greatest assets is her incredible wealth of heritage. From Stone Age Circles to Iron Age hill forts, Roman Baths to Medieval Castles, ruined Abbeys to vast Cathedrals, fine Manor Houses to Victorian seaside piers and pavilions - we have it all. The aim of this site is to offer the visitor a comprehensive insight into as much of Britain's heritage as possible."
The entire 3500 British Pathe news film archive covering "news, sport, social history and entertainment from 1896 to 1970" is now available online. The search facility allows one to locate and immediately view summaries and stills. Low resolution film "preview files" can be downloaded for viewing using Windows Media Player, free of charge to UK residents (though only after providing credit card and other identifying information).
Britain on Film - by the National Film Institute: "1,000s of beautifully preserved films, capturing 120 years of Britain on Film"