The Duchess of Cambridge could miss taking Prince George for his first day at school after suffering with severe morning sickness.

The Duke of Cambridge and Kate had been expected to drop off their four-year-old son as he starts at Thomas’s Battersea, a fee-paying independent school in south London, on Thursday.

But it is not yet clear whether the Duchess, who is less than 12 weeks pregnant, will be well enough to join the school run.

The Duke and Duchess of Cambridge and their children, Prince George and Princess Charlotte (Jane Barlow/PA)
The Duke and Duchess of Cambridge and their children, Prince George and Princess Charlotte (Jane Barlow/PA)

Kate was forced to pull out of two public engagements on Monday and Tuesday after suffering from hyperemesis gravidarum, as she had in her previous pregnancies.

On Tuesday – a day after it was announced they are expecting their third child – William said Kate was well, but admitted: “There’s not much sleep going on at the moment.”

He said: “We need Catherine to get over this first bit and then we can start celebrating. It’s always a bit anxious to start with, but she’s well.”

Prince George and his parents are due to be greeted by Helen Haslem, head of lower school, on their arrival at the school gates. They will then be escorted to his reception classroom.

The young prince will be dressed in a smart new uniform, comprising a navy v-neck pullover, matching Bermuda-style shorts, long red socks and black shoes.

His new school, where fees cost from £17,604 a year, has been described by the Good Schools Guide as: “A big, busy, slightly chaotic school for cosmopolitan parents who want their children to have the best English education money can buy.

“That is what they want and, to a large degree, that is what they get.”

George and his classmates will be taught a range of subjects and activities from ballet and art to drama, French, music and physical education.

Kate has already said she is not sure her son “has any idea what’s going to hit him” when he starts school.