Poppi Worthington death: Key dates

Poppi Worthington died in December 2012

Here are the key dates in the long-running investigation into the death of Poppi Worthington in Cumbria.

• December 12, 2012: Poppi Worthington dies aged 13 months in hospital. It triggers a police investigation and her father Paul and a 30-year-old woman are arrested

• February 2013: Former coroner Ian Smith opens and adjourns an inquest into Poppi's death, during which no records were taken

• March 2014: The High Court refuses to make public a fact-finding judgement surrounding Poppi's death

• April 2014: Cumbria Local Safeguarding Board launches a serious case review

• July 2014: Media organisations, including the BBC, fail to persuade a judge to make the fact-finding judgement public after Cumbria County Council asks for details about Poppi's death to be withheld for 15 years

• July 2014: The Independent Police Complaints Commission (IPCC) begins an investigation

• October 21, 2014: An inquest lasting just seven minutes, determines Poppi's death is "unexplained". No other details are revealed

• November 2014: Media organisations again fail to get court restrictions on publication of the fact-finding judgement lifted

• January 2015: Senior coroner David Roberts asks the Attorney General to grant a fresh inquest into Poppi's death

• March 2015 - Cumbria Police say Poppi's father and the woman arrested over her death will not face criminal action

• April 2015: A further attempt by media groups to have details of Poppi's death made public fails

• April 2015: The High Court agrees to an application from Poppi's father for medical evidence surrounding her death to be re-examined

• November 2015: Family Court judge Mr Justice Peter Jackson criticises Cumbria Police and the county council over their handling of Poppi's case

• November 2015: Some details of Poppi's death are made public and highlight police failings, including not preserving items for forensic testing

• November 2015: Retired detective Mike Forrester, who was one of those in charge of investigating Poppi's death, admits mistakes were made

• November 2015: Family Court hears of "astonishing incompetence" of police investigating Poppi's death

• December 2015: Conflicting theories heard in Family Court hears by experts over whether Poppi was sexually abused before her death

• December 2015: Lawyers acting for Poppi's father Paul tell the court that evidence suggested he had not abused his daughter

• January 2016: High Court family judge Mr Justice Peter Jackson made public his ruling that on the balance of probabilities Paul Worthington did sexually assault Poppi shortly before her death

• January 2016: Ex-justice minister Sir Simon Hughes calls for a criminal investigation to be reopened into Paul Worthington

• February 2016: A leaked Independent Police Complaints Commission (IPCC) report calls Cumbria Police's investigation into Poppi's death "unstructured and disorganised"

• February 2016: The government says it cannot order the release of the full IPCC report as requested by Barrow MP John Woodcock because it could jeopardise a fresh inquest

• March 2016: A pre-inquest hearing is held by the Cumbria coroner to determine a date and details for a full inquest

• June 2016: The Cumbria Local Safeguarding Children Board carries out a review and finds that family members could have have been offered more support because of a "complex history". The report also queries Poppi's mother's ability to protect her family

• July 2016: The CPS announces there is insufficient evidence to charge Poppi's father over her death, while Cumbria Police said it "deeply regrets" the way its investigation was handled

• September 2016: A second inquest is suspended, pending a review of the case by the CPS

• October 2016: A police officer demoted over the investigation retires

• November 2016: The CPS upholds a decision not to bring charges over Poppi's death

• March 2017: The full IPCC report is published listing a catalogue of failings by Cumbria Police

• November 2017: The second inquest into her death lasts three weeks and almost 40 people are called to give evidence. Poppi's father refuses to answer 252 questions citing his right under rule 22 of the Coroners and Justice Act not to incriminate himself

• January 2018: The coroner rules Poppi was sexually abused by her father before she died, and her death was caused by asphyxia

• March 2018: The Crown Prosecution Service says there will be no further review into Poppi's death.

Retired Cumbria Police detective Mike Forrester said "with hindsight" he would have done things better