I'm sure LoveFilm's existing content deals must have helped. There used to be a site called Oric which tried to make it easier for people to find the content they want to watch online legally, which was easy to scrape to compare. Now I have to rely on a dodgy mix of sites like
http://netflix.maft.co/,
http://netflixukcompletelist.blogspot.co.uk/,
http://uk.istreamguide.com/, paired with import.io and trawling Amazon's prime video site.