The officer was called to the scene London Ambulance service at 3:45 pm on Sunday. The victim was treated on the spot for a minor head injury before being taken to a hospital in central London. Her injury is not considered life-threatening.
After conducting a search, police officers recovered the knife from the area.
The video clip shows a person in black approaching a woman in a Charlie Hebdo T-shirt.
The Metropolitan Police has urged witnesses to come forward and help with their investigation.
In a statement, Detective Alex Bingley of Central West Command, who is in charge of police in Westminster, said: To explain her injury, what happened.
“We know that this assault was witnessed by many people. Many of them caught it on their phone.
“If you haven’t done so already, ask the police to contact you.
If you have the information, please contact the police via 101 or @MetCC. Please quote Cad4376 / 25 Jul.
Alternatively, call Crimestoppers at 0800 555111 to remain anonymous.
Speakers’ Corner Attack: Woman Slashed with a Knife in the Afternoon at Hyde Park | UK | News
SourceSpeakers’ Corner Attack: Woman Slashed with a Knife in the Afternoon at Hyde Park | UK | News