Royal fans rejoiced in Windsor and around the UK on Monday as the Duke and Duchess of Sussex welcomed a baby boy.

Buckingham Palace announced on Monday afternoon that Meghan had gone into labour in the early hours of the morning, with news of the newest member of the Windsor family coming soon after from Prince Harry himself, who said his son was “to die for”.

The baby boy, who is as-yet unnamed, was born at 5.26am weighing 7lb 3oz, with the duchess thought to have opted for a home birth at Frogmore Cottage, on the Windsor Castle Estate.

The town centre was filled with fans celebrating the birth of Meghan and Harry’s baby.

Terry Hutt celebrated his 84th birthday with Margaret Tyler as the world waited for news of the royal baby with bated breath, while shop Glorious Britain, near Windsor Castle, decorated its window display with royal baby items ahead of the new arrival.

Champagne bottles were popped as the birth was announced as fans celebrated news of baby Sussex finally making his way into the world.

Official Town Cryer Chris Brown, 51, from Windsor, proclaimed the good news in the shadow of Windsor Castle, surrounded by dozens of people eager to hear him bellow out details of the baby's arrival.

He told the crowds: “On behalf of his worshipful the mayor, the corporation and the people of the Royal Borough of Windsor and Maidenhead, it is my honour to congratulate the Duke and Duchess of Sussex on the birth of a baby boy.

“We welcome this new addition to our Windsor family and wish him long life, health and above all happiness.

“God save the Queen.”

Mr Brown said afterwards: “It's another wonderful day, we've got a royal family that’s growing and they are a Windsor family.”

Royal fan Anne Daley, 63, from Cardiff, was carrying two novelty balloons to celebrate the birth, one in the shape of a pram and the other an inflatable mixed-race baby.

She said: “I thought the baby might arrive today and we got here very early on and we are elated and over the moon.

“It's just amazing, I didn't think we would be here in Windsor for the royal wedding and then almost a year later be celebrating the birth of Harry and Megan's baby - it's just tremendous."

She predicted the couple might choose an American name for their son suggesting Marvin, after the Motown legend Marvin Gaye.

Fellow monarchy fan John Loughrey, 64, Has been camping on the streets of Windsor in just a sleeping bag since May 1, waiting for news of the royal birth.

He said: “We've been drinking champagne to celebrate the royal baby’s arrival, I'm going to have fish and chips followed by American apple pie.

“Harry is going to be happier than he’s ever been before because his life is fulfilled – his got his dream to have a family.”

Elsewhere in the UK, the London Eye turned red, white and blue to mark the baby’s arrival, while the BT Tower displayed a message of congratulations for the new parents.

Hundreds of people gathered outside Buckingham Palace to see footmen Stephen Kelly and Sarah Thompson bring out the easel to the palace forecourt to formally announce the birth of baby boy Sussex.

The notice read: “The Queen and the Royal Family are delighted at the news that Her Royal Highness The Duchess of Sussex was safely delivered of a son at 0526am today.

“Her Royal Highness and her child are both doing well.”

In a break with tradition, the notice on the easel did not include the signature of any physicians, indicating the couple wished to keep details of their medical staff private.

It is customary for doctors who attend royal women in labour to sign the formal notice, as they did following the birth of all of the Cambridges’ children.