Richard III's DNA questions UK royals right to the throne

He is one of the nation's most notorious monarchs and Richard III is still creating controversy more than 500 years after his death.
Genetic analysis of a battle-scarred skeleton - discovered under a council car park in Leicester three years ago - has confirmed that it did indeed belong to the last Plantagenet king.
But it may have also exposed skeletons in the closet of the British aristocracy - undermining the Tudor dynasty - and could even raise a question mark over the current Queen's royal heritage.
DNA analysis has revealed a break in the male line of Richard's family tree. It means one of Richard III's male relatives was cuckolded – leading to his wife to give birth to another man's child.
Depending on who was unfaithful in the family tree, it could have far-reaching consequences. The discovery was made by international researchers trying to prove the skeleton really was Richard III.
Given the wealth of other details linking the body to Richard III, the scientists conclude that infidelity is the most likely explanation. It isn't clear where in the family tree it occurred.
But if it occurred close to the top of the tree, near Richard III, it could be of 'key historical significance regarding royal succession'.
Of particular interest is the link between Edward III and his son John of Gaunt. If John of Gaunt was actually another man's son, the Tudors' right to the throne is threatened.
This is because Henry VII, the founder of the Tudor dynasty, claimed that his royal blood came from John of Gaunt. Henry's mother, Margaret Beaufort, was John of Gaunt's great-granddaughter.
If John of Gaunt was not Edward III's son, and so did not have royal blood, the 'claim of the Tudor dynasty would be brought into question', the researchers said.
This is important because the current Queen can her ancestry back to Henry VII, via James I and Mary, Queen of Scots.