Princess Kate has “mixed feelings” as George, Charlotte and Louis return to school after the summer holidays. All three children are pupils at the £7,000 a year Lambrook School in Berkshire, where they will now begin Year 7, Year 5 and Year 2 respectively. During the six-week summer holidays, the family enjoyed a variety of trips and activities. They spent a lot of time at their Norfolk country home Anmer Hall, which is close to the King’s Sandringham estate. They also enjoyed a Nerf gun battle at Bear Grylls’ Gone Wild festival at nearby Holkham Hall, whilst Charlotte joined her mother and au…