The Wales siblings didn't join the senior members of the firm for the Duchess of Kent's funeral proceedings, which took place at Westminster Cathedral on Tuesday.
The Prince and Princess of Wales's three children returned to their classrooms at Lambrook Prep School in Berkshire last week after the school holidays
The Prince of Wales opened up about his children's personalities as he and the Princess of Wales visited a branch of the Women's Institute in Sunningdale, Ascot
Prince Louis is the baby of the family when it comes to his position among siblings, Prince George and Princess Charlotte – the three children of William and Kate