At the opening of the inquest into the death of Peaches Geldof, Detective Chief Inspector Paul Fotheringham, of the Kent and Essex Serious Crime Directorate, said a post-mortem examination was inconclusive, prompting further tests.
But he told the hearing: "Recent use of heroin and the levels identified were likely to have played a role in her death."
Her mother, TV presenter and writer Paula Yates, died from an accidental heroin overdose at her London home 14 years ago.
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Despite the sunshine in short supply in the places the next few days - it stays warm and a little humid and close in places.
The surfer was at a popular tourist beach in Costa Rica when the crocodile attacked and bit him several times in the leg and head.
After a mild and quiet night, the best of the sunshine will be across the south east.