Video footage from Thursday afternoon shows two police cars attempting to corner the man in Chelsea before the suspect abandons his bike and sprints down the street.
Video footage taken on Monday shows the female victim laying in a doorway in Pond Place, Chelsea, while kicking her legs as an attacker donning a black balaclava and hoodie stands over her.
BBC TV star Shabs Ahmad had warned Sadiq Khan to address the spate of violent crime continuing to hit the capital. It comes as a woman in Chelsea was held at knifepoint in attempt to steal her watch