It is the first time Kate, 42, has left Windsor after returning to Adelaide Cottage, the family’s four-bedroom home, following her hospital stay (Picture: Getty) The Princess of Wales is ‘on the mend’ following her abdominal surgery last month and was able to join Prince William and their children for half-term in Sandringham, it has been reported. It is the first time Kate, 42, has left Windsor after returning to Adelaide Cottage, the family’s …