Astonishing CCTV footage shows a woman fleeing her attacker who she confronted while he was trying to burgle her flat.
The man tricked his way into the property in Hampstead Road, Kensington, and was caught on CCTV using the buzzer system to gain entry.
The victim's partner, who asked not to be named, claimed the burglar "tried to tie her hands and place clothing material in her mouth".
But the brave woman managed to fight him off and flee the flat, with CCTV capturing her running down a flight of stairs.
Once out in the street, the woman, who is in her 40s, screamed for help while her attacker escaped in a waiting vehicle.
Police confirmed they were investigating the aggravated burglary, which happened at around 4.50pm on Monday, October 26.
They said the man attempted to restrain the female occupier before stealing three mobile phones and a quantity of cash.
He then left the flat in the direction of Sheil Road in a waiting vehicle.
The woman was not seriously hurt during the incident but was reported to be left shaken by her ordeal.
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The male was wearing a blue jacket and black face mask.
An investigation is underway and CCTV and forensic enquiries have been carried out.
Detective Inspector Amy Smith said: "I would appeal to anyone who was in the area around Hampstead Road or Sheil Road on Monday evening who saw anyone or anything suspicious to contact us as they may have information which is vital to our investigation."
Anyone with information is asked to DM @MerPolCC or @CrimestoppersUK on 0800 555 111 quoting reference 20000649841.