Britain's Charles voices 'great joy' at new royal baby

Prince Charles voiced his joy today at the arrival of his third grandchild, as Britain waited to discover what Prince William and his wife Kate will call their new baby son.

Cannons were fired in London to mark the arrival of the little prince, who is fifth in line to the throne, and the bells of Westminster Abbey rang out in celebration.

The boy, weighing eight pounds and seven ounces (3.8 kilogrammes), was born at 11:01 am (1001 GMT) on Monday with William present for the birth.

The Duke and Duchess of Cambridge left St. Mary's Hospital in London around seven hours later, showing off their baby to the world's media and royal fanatics camped outside.

William's 69-year-old father Charles, the heir to the throne, said he and his wife Camilla were thrilled to have a new addition to the family.

The new baby is the younger brother of William and Kate's children Prince George, four, and two-year-old Princess Charlotte.

"We are both so pleased at the news," Charles said in a statement.

"It is a great joy to have another grandchild. The only trouble is I don't know how I am going to keep up with them." William, 35, and 36-year-old Kate are back at their Kensington Palace home in London.

As he left the hospital on Monday, the duke told reporters he was "very happy, very delighted," adding: "Thrice the worry now."