Showbiz
Mark Speight/ ITV/ Rex Features
The 31-year-old was found in the bath of the home she shared with fellow presenter Mark Speight in St John's Wood, north-west London, last Thursday.
Speight, who hosts art show SMart, is currently on police bail until February after he was arrested on suspicion of murder and supplying Class A drugs. He has denied any involvement in his fiancée's death.
Metropolitan Police said a post-mortem examination had proved "inconclusive" and further tests were required.
Detectives previously revealed that a suspected drug overdose is one line of inquiry being pursued.
> BBC host arrested after fiancée's death
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