The Duke of Sussex’s private security team recognised the woman immediately, as she is listed on a register of fixated individuals maintained by a private intelligence company working for the estranged royal.
Despite being alerted, court security staff were unable to intervene.
A source close to the Duke told The Telegraph: “There is nothing they could do; they are not the police. It’s a public building, and she has a right to be there.”
The source added: “He is obviously always worried about his security situation; it’s not ideal.”
A Pattern of Concerning Encounters
The incident comes as the Home Office continues a security threat review that was launched in December.
The woman, who is believed to have mental health difficulties, has previously appeared close to the Duke on multiple occasions.
She is said to have followed Harry to Nigeria and last September breached security at a central London hotel, where she gained access to a secure area during the WellChild Awards ceremony.
Just two days later, security sources confirmed she was again seen near the Duke at the Centre for Blast Injury Studies in west London.
