A post-mortem examination into the death of Peaches Geldof proved inconclusive earlier this year, as a full inquest is due to begin today at Gravesend Old Town Hall in Kent.
Blood and tissue were sent for toxicology testing, which later revealed that heroin had been in her system.
The preliminary inquest in May, which lasted just ten minutes, heard that Peaches' last known contact before she died was a phone call with a friend at 7.45pm on April 6. Her father-in-law saw her at 5pm that day and said she "seemed her normal self".
Roger Hatch, the coroner for north-west Kent, adjourned the full inquest until the end of July so that husband Thomas Cohen and Peaches' father Bob Geldof were able to attend. However, their attendance has not been confirmed.