Royal Baby: Duchess of Cambridge gives birth to a son

Prince William and Duchess Catherine has welcome their first baby. He was born at 4:24pm, weighing 8 lbs. 6 oz.

A bulletin - signed by the Queen's gynaecologist Marcus Setchell, who led the medical team that delivered the baby - was taken by a royal aide from St Mary's to the palace under police escort.

The document said: "Her Royal Highness, the Duchess of Cambridge was safely delivered of a son at 4.24pm today.

"Her Royal Highness and her child are both doing well."

The Kensington Palace press release said the Duke of Cambridge was present for the birth.

"The Queen, The Duke of Edinburgh, The Prince of Wales, The Duchess of Cornwall, Prince Harry and members of both families have been informed and are delighted with the news," it said.