Prince George will soon be due to move up to secondary school, and there is one major factor that will be crucial to the decision made by Prince William and Princess Kate, a royal expert has claimed. There has been much speculation about where the future King will be enrolled for his secondary education after he leaves Lambrook School - which only caters to pupils up to the age of 13. Both his sister, Princess Charlotte, nine, and Prince Louis, six, attend the same school, which is close to the Wales family residence of Adelaide Cottage in Windsor Home Park.

Princess Kate was reported to have visited two elite London day schools in December: University College School, in Hampstead, and the nearby Highgate School. If the purpose of her visit was to scout out possible future schools for George, 11, then the option of a day school would be a deviation from what both William and Kate experienced themselves. William attended the prestigious Eton College in Windsor, alongside his younger brother Prince Harry, whilst Kate boarded at Marlborough College after some tumultuous years at Downe House where she was reportedly bullied as a day girl.

One royal expert - Editor in Chief of Majesty magazine, Ingrid Seward - has claimed that there will be one major issue that will likely be a deciding for Kate and William when it comes time to enrol George in his next school. Speaking to Fabulous magazine, the expert explained that security costs will be something the Prince and Princess of Wales keep in mind as they make their final choice. "I think he will probably go to a co-ed where all three of them can be educated together, because also that cuts hugely down the security bill," the expert said.

"I think Kate and William are very conscious of how much it costs the taxpayer to guard them - guard not being the exact word - but to kind of give them the security which they absolutely have to have. "To have three different schools in three different parts of the country, I think would be very difficult.". The expert also said that in her view, the coeducational boarding school Marlborough College, which Kate and her siblings attended, is likely the couple's top choice. Fees at Marlborough currently come in at an eye-watering £19,714.20 each term - £59.142.60 a year.

The expert added, "He's had a lot of formality in his young life, and I think they would probably want him to be certainly co-ed, I would think, and just somewhere where he's free.". Other front runners for George's secondary school are reported to be Oundle School in Northamptonshire and St. Edward's School in North Oxford - also known as 'Teddie's'. Do you have a story to tell? Email: emma.mackenzie@reachplc.com.