An inquest has heard Peaches Geldof was a heroin addict who had been taking the substitute drug methadone in the two and a half years before her death.
Her husband, Thomas Cohen, has told the hearing the 25-year-old had started using heroin again in February this year.
Peaches was found slumped on a bed at their home in Kent in April.
A coroner has concluded that her death was "drugs related".
