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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The plaque at number 16 Cowley Street in Westminster marks the brown brick Georgian townhouse where Sir John lived for 31 years.
A man reportedly armed with several knives has been arrested in Whitehall on suspicion of planning a terror attack, police have said.
Metropolitan Police officer, Tom Harrison, has been crawling the course since the race began on Sunday morning.