Kate Middleton is set to 'step up' and 'take on the role of future Queen' following the death of Prince Philip, a royal expert has claimed. Speaking exclusively to FEMAIL, royal biographer Phil Dampier said Kate is 'maturing rapidly in her role' as she approaches her 10 year anniversary of marrying Prince William and becoming a royal. The Duchess of Cambridge , 39, is said to have played peacemaker between ...