The infant prince, third in line to the British throne, is now home with his parents, the Duke and Duchess of Cambridge.

His life will be one of privilege, of course, but also one of formal duty and protocol.

For some perspective, consider the childhood of his great-grandmother, Queen Elizabeth, who grew up during World War II. The Queen visited her great-grandson for the first time today.

The BBC's Nicola Stanbridge reports on the life of an heir to the throne.