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The Duke and Duchess of Cambridge have left hospital with their baby in a car driven by Prince William himself.
The Duke of Cambridge took questions as he stood outside the hospital holding his new son.
"He's got a big pair of lungs on him, that's for sure," said Prince William.
"We're still working on name."
It's an event that's sparked celebrations round the world but right here in the East region we've more reason than most to mark the birth of the new royal baby.
There's been particular delight in Cambridge, which has a new Prince.
Those who have met the Duke and Duchess say they'll make excellent parents
In a statement issued on their behalf, the Duke and Duchess of Cambridge have thanked hospital staff that helped care for them during the birth of their son.
Prince Charles has entered the Lindo Wing of St Mary's Hospital where his first grandchild was born yesterday.
His wife, Camilla, accompanied him.
"Have you had a long wait?" Charles asked reporters.
Bookmakers have seen George and James become the favourites for the new prince's name.
George was the favourite with William Hill (5/2) and Paddy Power (6/4), while Ladbrokes had James at 2/1.
Henry, the given name of the Duke's brother Prince Harry, is also in the running, along with Alexander and Louis.
Ladbrokes has Henry at 5/1, the same as it is offering George, after what it said was an "unprecedented amount of bets" in the last 48 hours bringing it in from 50/1.
The public may have to wait to cash in their betting slips. It is not uncommon for royals to take their time naming babies: Queen Elizabeth II and her husband Prince Philip waited for a month in the case of Prince Charles.
The Duke of Cambridge's uncle, Earl Spencer, described his joy at the new royal baby.
"We're all so pleased: it's wonderful news," he said.
The Earl, whose sister was the Duke's mother, Diana, Princess of Wales, added: "My father always told us how Diana was born on just such a blisteringly hot day, at Sandringham, in July 1961. It's another very happy summer's day, half a century on."
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The Duke and Duchess of Cambridge proudly showed the world their baby son, a future king, before taking him home tonight.
The royal baby appeared to wave as he was introduced to the crowds outside the hospital for the first time.