Royal baby: PM Cameron on 'very exciting' news

Prime Minister David Cameron has passed on his best wishes to the Duke and Duchess of Cambridge, calling it "very exciting news."

"One of the privileges of my job, is you get to see them up front and they are a wonderful couple and loving parents," he said.

Catherine was admitted to the Lindo Wing at St Mary's Hospital in west London where her first child, Prince George, was born in July 2013.