Royal Biographer Angela Levin has revealed who she believes could step up to take on royal duties, as King Charles and Princess Kate begin their recovery from their surgeries. King Charles left hospital on Monday after undergoing a “corrective procedure” for a benign enlarged prostate. The Princess of Wales is also recovering at home after spending 13 days at The London Clinic hospital. Princess Kate had a successful “planned abdominal procedure” and is not expected to return to royal duties until after Easter. Prince William has also postponed current planned royal engagements while he looks …