A few years ago, Spire Films produced a film on behalf of Channel 4, as the result of research by London historian, Michael K Jones. The article based on Richard III suggested that there was a cover-up to the fact that he was illegitimate and therefore should not have had claim to the throne. The true line of monarchy pointed instead to Michael, Earl of Loudoun.
http://www.channel4.com
Check out the links for the story.