A man indecently exposed himself in a park.
The attack took place in Churchfields, Harrow on the Hill, on November 8.
The man is reported to have exposed himself in front of a woman in the park at around 5.20pm.
The Metropolitan Police has issued a computer-generated image of the suspect.
He is described as being around 5ft 10 inches, aged in his 20s, with gelled hair and stubble.
Officers have urged anyone who recognises him to Message @MetCC on X, or call 101 quoting CAD 5522/08Nov.
Anonymous tip-offs can be sent to the independent crime charity Crimestoppers on 0800 555 111.
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