The inquest into the death of singer Amy Winehouse will be reheard, according to a spokesman for Camden Council.
The Back to Black star was found dead at her north London home last year, aged 27.
The move comes after an investigation found Suzanne Greenaway, who oversaw the inquest into Winehouse's death, did not have the correct qualifications for the role.
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A former health and safety chief said building regulations are confusing and the profession suffers from competence issues.
The tiny card, which is 15 microns by 20 microns, even includes an intricate inscription of a snowman and seasonal messages.
Police say they have traced four drivers who are thought to have hit the woman, and added that a fifth vehicle may also have been involved.