A man believed to be in his 40s and a girl thought to be four years old have been found dead at a property in Notting Hill.
Police were called to an address in Colville Square shortly before 8pm yesterday, following concerns for the welfare of people living there.
Officers forced their way in and found the two bodies. Both were pronounced dead at the scene by London Ambulance Service.
The deaths are being treated as unexplained.
A woman in her 30s has been arrested in connection with the deaths and is currently in custody. Police are not looking for anyone else as part of the investigation. They are in the process of informing family members. A post-mortem examination will be held in due course.