sentences:  In 2006, the festival became the official home of The Arthur C. Clarke Award, the most prestigious award for science fiction literature in Britain, and recognised as one of the most prestigious science fiction awards in the world.Since its inception, the Sci-Fi-London Film Festival has also been one of the few places in the United Kingdom to consistently screen "All-Nighters" — film marathons which run throughout the night.These have focused on anime, horror, Alien, and Matrix films as well as episodes of the cult American television series