Britains Real Monarch is a 2004 English-language Documentary motion picture. Based on the supposed illegitimate birth of Edward IV, Tony Robinson takes viewers through history to find the rightful Plantagenet heir to the throne of England living in a quiet corner of the Commonwealth. Britains real monarch stars Tony Robinson in the title role. Based on the supposed illegitimate birth of Edward IV, Tony Robinson takes viewers through history to find the rightful Plantagenet heir to the throne of England living in a quiet corner of the Commonwealth.