Prince William has joked that he is glad that his wife is not having twins because his "mental health would be tested".

Speaking at an awards ceremony, the royal father-of-two said he was trying to get as much sleep as he can before the arrival of another baby. The Duchess of Cambridge is due to give birth to their third child in April.

The Duke of Cambridge gave out prizes to former rough sleepers at the Centrepoint Award, run by his mother's favourite homeless charity.