Were David Cameron ever to become Prime Minister, he and his wife Samantha would be the most aristocratic occupants of Downing Street in more than 40 years. Michael Rhodes and Political Editor Simon McGee report.
BLUE may be the colour of David Cameron's political allegiance – but it is also the colour of the blood that flows through his and his wife's veins.
The Yorkshire Post can reveal that there is far more to the Conservative leadership frontrunner's privileged background than just Eton and Oxford.
The would-be next Tory Premier and his "First Lady" are both descended from Kings of England – Mr Cameron from the House of Tudor and his wife from the Merrie Monarch Charles II.
Not since Sir Alec Douglas-Home, the last Eton and Oxford- educated Prime Minister, who was born a Scottish earl and occupied Number 10 for just a year until 1964, has there been anyone with a shot at the top job with such a lineage.
Seventeen generations separate David Cameron from his ancestor Henry VII, founder of the House of Tudor, a dynasty that ruled until 1603 and whose descendants reign today. Tudor united the houses of York and Lancaster by marrying Elizabeth of York, daughter of Edward IV, and Mr Cameron descends from their daughter, Mary, who married Charles Brandon, Duke of Suffolk.
The aristocrats in Mr Cam-eron's blood line include numerous dukes and earls, including the Herbert Earls of Carnarvon.
His cousin, the unfortunate 5th Earl of Carnarvon, was the Egyptologist who entered Tutan-khamun's tomb in 1922 and was dead within months – some say from the curse of the Pharoah.
He is also related to the Feilding Earls of Denbigh and Desmond, and hence kin of Henry Fielding, author of The History of Tom Jones and Amelia.
Mr Cameron's maternal great-grandfather was Sir William Mount, 1st Baronet, a Conservative MP for Newbury 1900-06 and 1910-1918, and his grandfather, another Sir William, the 2nd Baronet, was also a Tory MP.
But it is not only Mr Cameron's family that has such a colourful and long-standing history. His wife Samantha may have a tattoo and come from Scunthorpe, but she is just as blue-blooded.
Her father Sir Reginald Sheffield 8th Baronet, squire of Normanby Park, Lincolnshire, was appointed a deputy lieutenant for what was then Humberside in 1985.
Mrs Cameron's mother is the 1960s "It Girl" Annabel Jones, who divorced from Sir Reggie when Samantha was a child.
She went on to marry Tory peer Viscount Astor, son of the 3rd Viscount of Cliveden. His home was at the centre of the 1963 Profumo scandal, which helped bring down Douglas-Home's government.
Mrs Cameron's paternal grandmother was the late Nancie Sheffield, owner of the magnificent Sutton Park, at Sutton-in-the-Forest, near York, and through her Samantha descends from Charles II and Nell Gwyn.
Her ancestors and relatives include a variety of dukes and barons and her maternal grandmother, Pandora Jones, was a god-daughter of the Duke of Windsor, formerly Edward VIII.
Working class Davis says he wants social justice
Leadership hopeful David Davis said his working class credentials made him the real Tory champion of social justice.
Old Etonian rival David Cameron has accused Mr Davis of running a "right-wing, core vote" strategy that will leave the party stranded in Opposition.
But the shadow home secretary vowed to "fight tirelessly for social justice to be at the heart of the Conservative agenda".
"I grew up on a council estate. I went to a local state school. But I was lucky. It was a good school, the teachers were good, I was able to make use of that," he said.
"A lot of kids who live there now haven't got that option and I really want to make sure that that is available to everybody."
Mr Davis also made a fresh dig at the shadow education secretary, saying: "We have got to be principled, very straightforward, what-you-see-is-what-you-get, less media manipulation, less obsession with image, bluntly, all those things I think I characterise."
Both men will make speeches today in a critical phase of the contest immediately after postal ballots have been sent out to the 300,000 party members.
Although Mr Davis has made up some ground since a Question Time debate he was widely judged to have won, Mr Cameron, 39, remains the clear front-runner.
However, he admitted his wife Doreen was "mildly nervous" about the prospect of being thrust into the spotlight.