London's public transport companies have been using moving images to promote services and train staff since the early years of the twentieth century. Although the film collection inherited from London Transport in the 1980s is perhaps best known for the documentaries made by British Transport Films in the 1950s and 60s, the collection stretches beyond this time frame in both directions, going as far back as 1910, and including video tapes and digital media from the 1990s to the present day.