The man who should have been King: Australian forklift driver
that historians said was true heir to British throne dies aged 71
(Daily Mail)
An Australian forklift driver who some historians argued was the true heir to the British throne has died in the small New South Wales town he called home.

Mike Hastings, 71, was a real-life aristocrat, born the 14th earl of Loudoun, who moved to Australia in 1960 in search of adventure.
He was a descendant of England's House of York, whose dynastic struggle with the House of Lancaster became known as the Wars of the Roses and was dramatised by William Shakespeare
Wait. What?
The British documentary [in 2004] found documents in France's Rouen Cathedral he believed showed King Edward IV, who ruled with a brief interruption from 1461 to 1483, was illegitimate.

Historian Michael Jones believes that Edward's father Richard of York was fighting the French at Pontoise when he was conceived.

His mother Cecily was 125 miles away at Rouen, allegedly in the amorous arms of an English archer.
The rest of the story at DM link above, along with many pictures and a massive "Who would have ruled if it was found Edward IV was illegitimate?" sidebar plus the documentary in question. (And also the fact that Mr Hastings was an avowed republican.)