Police discovered no evidence of drugs paraphernalia in the house, leading to speculation that items may have been removed before the property was searched. Roger Hatch, the coroner, waited for results of the toxicology tests to determine if Ms Geldof had died of an overdose before deciding to open an inquest after a post-mortem examination failed to establish the cause of death.

The results will be announced by Detective Chief Inspector Paul Fotheringham during a brief hearing in Gravesend, Kent, this afternoon. Police used drugs sniffer dogs during the search of the house and examined the contents of rubbish bags.

Mr Hatch, the coroner for northwest Kent, will adjourn the inquest until the end of July to ensure that Ms Geldof’s husband Thomas Cohen, a rock singer, and her father Bob Geldof, the former singer of The Boomtown Rats and founder of Live Aid, are able to attend the full hearing.

What happened to the usual items used when smoking or injecting heroin is likely to be a focus of the on-going investigation. It is not known who supplied the young mother with the drugs.