Erherhe Iwheta, generally known as ‘Rae Rae’, left house in Streatham at round 16:45hrs on Wednesday, January 25.
Officers have established she boarded a practice to Herne Hill the place she modified for a practice to London Victoria station.
She was final seen on CCTV at Victoria underground station strolling in direction of the Northbound platform at 17:45hrs that night.
Rae Rae was sporting a black coat, black leggings, black sneakers and a purple hair wrap. She was carrying a darkish rucksack and a white tote bag with black writing on.
Sergeant Holly Sturgeon Lewis from the Central South Command Unit stated: “I need to hear from anybody who could have spoken to or seen Rae Rae, together with anybody who remembers seeing her on the tube on Wednesday night.
“Rae Rae’s household are determined to listen to she is secure and nicely so if in case you have any details about the place she is, please get in touch instantly.”
Anybody with data is requested to name 101 or tweet @MetCC and quote 23MIS002779. For a direct sighting of Rae Rae please name 999.