The Duke and Duchess of Cambridge’s children animatedly entered Lambrook School for their first day yesterday for a first-time introduction before classes begin in earnest today. The third, fourth and fifth in line to the throne are expected to complete their education without press interference, but the family had agreed to a small chat with a reporter, photographer and cameraman on their first day at the private school near Windsor. A group of royal protection officers kept out of sight as the children approached. William drove his wife and children on a 15-minute drive from Adelaide Cottage, their new home chosen because