Prince George, Princess Charlotte and Prince Louis are thought to be starting at Lambrook School near the Windsor Estate in September following a family relocation to Adelaide Cottage to be nearer to The Queen.
Lambrook charges an increasing annual fee as the children go through the school, meaning that the three Cambridge children's education will cost an incredible £71,344 a year.
When he joins in Year 1, Louis's annual fees will amount to £17,556, while Charlotte's will total £25,792 and George's will be the highest at £27,996 per year.
