Local resident claims she walked through Thomas's Battersea halls unchallenged just days before term starts.
The step will follow a lengthy marriage process, and the princess will lose her royal status after the wedding.
Lyndsay Simpson wrote a letter to the Queen asking if she could borrow a swan to keep as a pet.
Duchess of Cambridge's sister tied knot with hedge fund manager in May.
Nick Serpell has said he is 'bored' with the 20th anniversary coverage.
The royal couple are already parents to one-year-old Prince Alexander, who was born in April 2016.
Tot is having great fun learning how to dance, which was one of her late grandmother's favourite hobbies.
The former Egyptian playboy was travelling with the Princess of Wales when their car crashed in Paris.
Princess Diana was the most photographed woman in the world, yet some images of her have rarely been seen.
Duchess of Cambridge was in high spirits in the White Garden with her husband and brother-in-law.
Four-year-old starts at Thomas's Battersea in London on 7 September.
"I still feel very angry that we were not old enough to be able to do more to protect her."
Princess reportedly said: 'My God, what's happened?' before suffering a cardiac arrest.
Café Diana, located in Notting Hill, was frequented by the People's Princess.
Lana Marks pulled out of a four-day holiday to Milan which prompted Diana to travel to Paris with Dodi.
Royal commentator Richard Fitzwilliams explains why the princes are being so open about their late mother.
The princess's sons will remain out of public sight in Balmoral on the anniversary.
The royal had his arms wrapped around the Suits star.
Michael Mansfield QC says police did not properly investigate a note in which Diana predicted her death.
Colin Tebbutt had to stop people visiting Diana's body as she lay in a hospital bed.
Her life was lived in the spotlight, soundtracked by the click and whirr of a million cameras.
Two decades on from Princess Diana's death in a car crash, conspiracy theorists still obsess over it.
Colin Tebbutt describes the events of the night 20 years ago.
Duke of Cambidge isn't so keen on the idea of expanding their brood.
'December they can announce the engagement and they'd be free to marry next year,' says Darren McGrady.
The princes have a day of events to mark the 20th anniversary of their mother's death.
'She had quite a severe head injury but was still very much alive on the back seat,' the royal added.
The princes opened up in a BBC documentary to be screened.
Royal speaks to Mark Austin in Channel 4 documentary Wasting Away: The Truth About Anorexia.
Body language expert Judi James breaks down three key interviews in the relationship.