Pregnant Kate gives a big smile as she leaves hospital after three-night stay with Wills by her side

The pregnant Duchess of Cambridge smiled this morning as she left hospital after four days of treatment for acute morning sickness, telling reporters outside: 'I'm feeling much better, thank you'.

She was discharged from the King Edward VII Hospital in central London following three nights under observation and will now head to Kensington Palace for a period of rest, St James's Palace said.

Kate, 30, emerged from the private hospital looking relaxed, carrying a bouquet of yellow flowers and giving a brief smile to the waiting press before being driven away with her husband Prince William.