A woman who was hit by a motorcycle that was part of the Duchess of Edinburgh's police escort has died, the UK's Independent Office for Police Conduct (IOPC) has confirmed.
Helen Holland, 81, was struck on West Cromwell Road and Warwick Road in Earl's Court in London 10 May.
In comments carried by the BBC, Ms Holland's son, Martin said she died after sustaining "multiple broken bones and massive internal injuries".
He said she fought "for her life for nearly two weeks... but irreversible damage to her brain finally ended the battle today".
He said she was using the "safe route of [a] pedestrian crossing" when she was struck by the motorcycle.
The Duchess of Edinburgh said she is "deeply saddened" by Ms Holland's death.
A Buckingham Palace spokesperson: "The Duchess of Edinburgh is deeply saddened to hear that Helen Holland has passed away.
"Her Royal Highness's deepest condolences and sympathies go to all of Ms Holland's family."
It is understood the Duchess will be in touch privately with Ms Holland's family.
The IOPC have been investigating the incident and said on 19 May that they were appealing for witnesses and had taken CCTV from nearby properties for examination.