THE widow of Andrew Jordan has confirmed she is consulting the family's legal team about taking civil action against all three agencies involved on the day her husband died.
Savitri Jordan expressed her thanks to the jury but said nothing could bring back her husband.
She said the couple's daughter Louise, six, had a right to know how her father had died.
She said: "We trust and depend on these services to look after us.
"You would not expect something like this to happen in a country like England."
The London Ambulance Service (LAS) has admitted to failings on the day.
Director of operations Martin Flaherty said: "We accept there were things our crew should have done differently when caring for Mr Jordan."
But he claimed they were dealing with a "very rare and difficult situation" and although they feared he might be violent, "They did all they could to save him".
He said the service would be amending its clinical guidelines and its training on the dangers of positional asphyxiation.
New advice on dealing with patients with mental health problems was issued last year.
The LAS is working with the Met Police on how mental health patients should be transported and on improving communications with other agencies in situations similar to the Jordan case.
Bexley borough police commander Chief Superintendent Robin Merrett said: I want to reassure everyone concerned I am determined to learn from this desperately sad incident."
He said the inquest's finding and recommendations would be studied "to make sure something like this never happens again."
He added: "Things did not work out the way they were intended."
He defended the number of police officers (13) on the scene, saying in such incidents all available officers attend and are released as soon as the situation calms down.
He added more than half of those attending had been probationary officers because of the large numbers of new officers recruited to the Met.
Oxleas NHS Trust, whose mental health team was trying to assess Mr Jordan, said: "We are satisfied the mental health care Mr Jordan received from the trust was of a high standard and appropriate plans were put in place for the assessment of Mr Jordan on the day of his death."
A spokesman said although its staff do receive training on positional asphyxia, it will be reviewing its training.
Jordan family solicitor Susie Yau said the family had "received no apology from the agencies which could and should have prevented this tragedy. What happened to Andrew should never happen to anyone".
Gilly Mundy, from the pressure and support group Inquest, which has been working with the family, described the evidence at the inquest in relation to positional asphyxia as "incredible", since the condition has been known about by police for at least 15 years.
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