Croydon Police are looking for witnesses to an assault on the Mitcham Road on April 1.
A woman was walking along the street towards the Lombard roundabout at around 9am when she was approached by a man.
The man is said to have pushed her in the chest and slapped her in the face before running from the scene.
Her attacker is described as a light skinned black man, 5ft 8in tall and aged in his late twenties.
He is of athletic build and has short hair and a tattoo of the word mum on the left side of his neck.
He is described as wearing a white jumper and blue jeans.
Anyone with information is asked to contact Croydon CID on 020 8649 1850. Alternatively to remain anonymous, call Crimestoppers on 0800 555 111.
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