You can access the pages for the libraries and archives of these museums by following these links. Some of these museums even have an online research facility.
http://www.sciencemuseum.org.uk/researchers/dana-research-centre-and-library - The Science Museum
http://www.wellcomecollection.org/ - The Wellcome Collection
http://www.nhm.ac.uk/research-curation/library/archives/index.html - The Natural History Museum
http://www.vam.ac.uk/page/a/archives/ - The Victoria and Albert Museum
http://www.prm.ox.ac.uk/researchintro.html - The Pitt Rivers Museum
http://www.britishmuseum.org/research/libraries_and_archives.aspx - The British Museum
http://designmuseum.org/ - The Design Museum
http://www.iwm.org.uk/collections/search?query=war&submit=&items_per_page=10 - The Imperial War Museum
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