The 48-year-old female driver was arrested earlier on suspicion of causing death by dangerous driving and is currently in custody.
This is the second time she has been arrested for this offence, the first time being at the scene of the collision on the 6th of July 2023.
Nuria Sajjad and Selena Lau, both eight years old, died when a car crashed through a fence and collided with a building at the school in Camp Road on the edge of Wimbledon Common.
An initial investigation by the Roads and Transport Policing Command resulted in a direction from the Crown Prosecution Service in June last year that the driver should face no further action.
After concerns were raised by the families of Nuria and Selena regarding this outcome, it was agreed the Specialist Crime Review Group would carry out a review of the investigation. That review identified lines of enquiry which required further examination.
In October the investigation was moved to the Specialist Crime Command, under Detective Superintendent Lewis Basford. He leads a team who have since been pursuing new lines of enquiry identified by the review.
Detective Superintendent Basford said: “I would like to take this opportunity to appeal to any witnesses or individuals with information who are yet to speak to police to please come forward.
“Were you attending the local golf course or driving in or around the area of the Study Prep School in Wimbledon at the time of the collision? Did you see the vehicle – a distinctive gold Land Rover Defender – in the lead up to the collision? We believe there were people in the local area who have not been spoken to by police and remain unidentified. I would ask those individuals to please contact us.
“Our main priority is to ensure the lines of enquiry identified by the review are progressed. This is a live investigation and in order to maintain its integrity I can’t go into further detail at this stage. I would urge people to avoid speculation.”
To provide information, you can contact the major incident room on 0207 175 0793, call 101 quoting CAD 6528/27Jan, or message @MetCC on X providing the CAD reference.
Alternatively, contact Crimestoppers anonymously on 0800 555 111 or online.