The families of the two girls now want to meet with the incumbent mayor of London, Sadiq Khan.
They want protocols to be changed so that collisions in the public interest involving the death of children are given more priority.
Trevor Sterling, the solicitor representing the families, said: “The reality is the one enemy of justice is delay.
“What we know is part of the cause of the delay is significant. Part of that is resourcing of forensic examiners.
“What we know is it takes a year to a year and a half typically for forensic examiner’s reports to be prepared.
“And the reality is with that level of delay, there is an impact on the timings of inquests, on the impact of a criminal trial, there is an impact on the civil cases.
“Delay is an enemy of justice and we need to make sure there is a process where that can be expedited.”
