It comes after the Metropolitan Police was called to Hertsmere Road just before 4.30am on August 23.
Officers were dispatched alongside the London Ambulance Service, where a woman in her 20s was found at the scene.
She was taken to hospital and continues to be supported by specially trained officers.
Five days since the alleged attack, there has yet to be an arrest.
A spokesperson for the Met has advised it is making “urgent enquiries”.
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They said: “At this time no arrests have been made, but officers continue to make urgent enquiries.
“Anyone with any information, or who was around the area at the time is urged to contact police by calling 101 or online, quoting CAD1371/23AUG.
“Alternatively, you can contact the independent charity Crimestoppers anonymously on 0800 555 111.”
