Sarah Everard had been at a friend's house in Clapham on Wednesday evening. At approximately 9pm, she left the property in Leathwaite Road through a back gate onto the A205 South Circular and began walking to her home address in Brixton.
Concern is growing for Ms Everard says Mark McQuillan as police issue calls for people to check CCTV and dashcam footage
The 33-year-old is thought to have walked across Clapham Common and was expected to arrive home approximately 50 minutes later. It is unclear if Ms Everard returned to her home address. She has not been seen or heard from since.
The CCTV image of Ms Everard released by the police was captured in Sainsbury's on Wednesday. She visited the store to buy a bottle of wine before going to her friend's house.
Detective Chief Inspector Ian Kenward says officers and family members are concerned about Ms Everard
Ms Everard's phone signal was last picked up near Clarence Avenue, in Clapham, where she left another friend.
In a statement, Ms Everard's family said: "With every day that goes by we are getting more worried about Sarah.
"She is always in regular contact with us and with her friends and it is totally out of character for her to disappear like this.
"We are desperate for news and if anyone knows anything about what has happened to her, we would urge you to please come forward and speak to the police."
Officers have asked people in the following areas to check doorbell or dashcam footage for any sightings of Ms Everard on Wednesday night on:
The A205 South Circular around Clapham Common
New Park Road
Brixton Water Lane
Detective Chief Inspector Ian Kenward, from the Central South Public Protection Team, said: "We are also growing increasingly concerned for her welfare and have officers working round the clock to try and find her.
"I would ask anybody who was in the Clapham Common area on Wednesday night to think about whether you saw Sarah or any suspicious activity around the time of her disappearance."
Ms Everard was last seen wearing a green rain jacket, navy blue trousers with a white diamond pattern and turquoise and orange trainers. She was also thought to have been wearing green earphones and a white beanie hat.
She is 5 ft 4 (162cm), of a slim build with blonde hair.
Specialist officers and volunteers from London Search and Rescue are carrying out searches in the area of Clapham Common and the walking route between Clapham and Brixton.
Anyone with information is asked to call 101 quoting CAD 3309/06MAR. Information can also be provided anonymously by calling the Missing People charity on 116 000.