Det Ch Supt Clair Kelland, in charge of policing for south-west London, said: “Our thoughts remain with the families of Nuria and Selena, who we know are greatly loved and missed.
“This was a tragic incident and we understand that the families want and need answers as to what happened. We are continuing to give them specialist support through our dedicated family liaison officers who are providing updates on the investigation where they can.
“Specialist detectives are working tirelessly to establish the circumstances of that day, including analysing CCTV and examining the expert report from forensic collision investigators.
“The incident involved the large-scale deployment of joint resources from the Met, LAS (London Ambulance Service) and LFB (London Fire Brigade) and we are working closely with them, as well as the Crown Prosecution Service, as part of our investigation.
“We recognise that the time taken can cause further distress but it is only right and fair to all involved that we carry out a thorough and extensive investigation.”