Detectives from the Homicide and Major Crime Command continue to investigate following a fatal fire in Teddington.
Police were called just after 1.00am on Wednesday, 22 August, to a fire at an address in Mays Road.
Officers attended along with London Ambulance Service and London Fire Brigade.
A 72-year-old woman was found dead inside the address.
The victim has been named as Carole Harrison who lived at the address; her next of kin have been informed.
A post-mortem examination took place at Kingston Mortuary on Thursday, 23 August – no formal cause of death was determined and the results of further forensic tests are awaited.
At 3.30pm on Saturday, 25 August, detectives arrested a 54-year-old man on suspicion of murder.
He was taken to a central London police station and has now been bailed to a date in mid-September.
Any witnesses or anyone with any information is asked to call the incident room on 020 8721 4622.