The UK's most famous royal correspondent, Jennie Bond, asks the question: 'Who is Britain's Greatest Monarch?' The twelve monarchs in contention are:

• William the Conqueror
• Edward I
• Henry II
• Henry V
• Richard III
• Henry VIII
• Elizabeth I
• Charles I
• Charles II
• George III
• Victoria
• Elizabeth II

The order of the twelve Kings and Queens will be determined by the persuasiveness of their 'champions'; celebrity historians and well known commentators, who, in each case and over a variety of different criteria, will argue their monarch's cause.

The film brings you a heady and exciting mix of the high quality reconstruction scenes and lively debate between Jennie and each respective champion and the tension of the countdown on an issue people all over the country continue to care passionately about.

Will the testosterone fuelled fans of the all-powerful, blustering Henry VIII get their way? Will the pro-Europe Francophiles see their beloved William the Conqueror claim the title? Or will the long-suffering Elizabeth II be awarded the ultimate accolade?