Richard speaks to Adrian Gilbert about his latest book "The Blood of Avalon". The book continues on from his earlier work with historians Wilson and Blackett about the real King Arthur in South Wales. He has made some incredible discoveries independent of Wilson and Blackett which provide further evidence that the famous King Arthur legend does in fact originate in Glamorgan. By analysing various place names he has pin pointed the actual location of the Grail Castle spoken of in Arthurian legend. He also explains that the name of the church which Wilson and Blackett excavated in 1990, where Arthurian artefacts were found, is named after Bedivere, one of Arthur's knights. This area is known in legends as Avalon, and was able to hold onto its original history for many years due to the fact that the land remained for centuries outside of Norman rule. Adrian explains how blood lines are crucially important when making a claim to the throne. The Holy Grail Arthurian bloodline could present a major threat to the current royal bloodline of the UK, which might explain the attempts to bury Wilson and Blackett and their research - and why someone in 2011 detonated a bomb strategically placed under Baram Blacket's bed.