Detectives investigating an arson at a restaurant in Knightsbridge have released a CCTV image of a witness they would like to speak to.
Officers were called to restaurant in Brompton Road, shortly after 03:00hrs on Thursday, 6 December of last year to reports of a fire.
The fire caused extensive damage to the front of the restaurant.
There were no reported injuries.
Detective Constable Lee Moon said: "If you recognise this woman, or the person in this image is you, please contact us.
"We think you might have information about two men we want to trace in connection with the fire and it may be that you can help us, even though at this stage you may not realise it.
"You are not being treated as a suspect and we'd really appreciate you getting in touch."
The white woman pictured is believed to have been wearing a red coat, blue jeans and blue and white trainers at the time of the incident.
Detectives also still want to speak to two men in CCTV images released by the Met in December.
This shows two men who were near to the restaurant at the time the fire started and it is these two men who the female witness may have spoken to prior to the incident.
The first man is described as wearing a black/navy blue parker jacket with lighter coloured 'fur like' lining around the hood, dark jogging bottoms with lighter coloured horizontal lines on the rear, a round neck dark coloured sweatshirt and black trainers.
The second man was wearing a light coloured brown jacket, dark coloured trousers and black shoes.
Any witnesses or anyone with any information about the identities of the two men or woman in the CCTV images is asked to contact detectives by calling 101 with CAD reference 812/06DEC18 or via Twitter @MetCC.
To give information anonymously contact Crimestoppers on 0800 555 111 or online at crimestoppers-uk.org.