With the Royal Wedding in London just two days away, speculation is rife as to what Catherine Middleton will wear when she marries Prince William. But it will be "simple" and not anything like the dress Princess Diana made famous 30 years ago. That's according to Elizabeth Emanuel, the British designer who created the iconic gown back in 1981. In this special Royal Wedding interview, she speaks to James Chau in London about life "with" and "after" Diana.