Princess Kate will “lean on” her trusted nanny, Maria Borrallo, as she recovers at home, a royal source has claimed. The Princess of Wales left The London Clinic yesterday after spending 13 days recovering from an abdominal operation. As she returns home, her nanny’s help will be “invaluable” as William continues to be “present as a father” to the royal couple’s three children. Royal commentator Richard Fitzwilliams said: “Kate has obviously had significant surgery. As a hands on mother when possible, she will need to rest as much as she can. “This means she will rely on Maria a great deal in …