Prince George, Princess Charlotte and Prince Louis started a new term at Lambrook School on Wednesday 7 September.The Duke and Duchess of Cambridge's three children recently started at the private establishment, which is a leading co-educational prep school located in the Berkshire countryside, just a short journey from the family' new home at Adelaide Cottage in Windsor. The prestigious school costs up to £6,999 term and with all three of their children now attending the school, Kate, 40, and Prince William, also 40, could be forking out over £50,000 a year.