A woman filmed being struck by a policeman at the G20 protests has described his actions as "very violent and unnecessary".
Footage showed Nicola Fisher, 35, from Brighton, being hit across the face and struck on the legs with a baton, and a Metropolitan Police sergeant has since been suspended from duty pending an independent probe into the incident.
In a TV interview, Ms Fisher - who is being represented by PR agent Max Clifford - said of the baton strike: "It wasn't a tap, he used his full force. It was very violent and aggressive and unnecessary."
She told the BBC that the gathering on April 2 at first seemed "very calm and very peaceful".
"Suddenly quite a few police officers came and made a line in front of us and almost straight away the officer in front of me shouted, 'Get back' and pushed me before I even had a chance to move," she said.
"When he did that I, as an instant reaction, pushed back, then straight away he gave me a backhander across my left cheek.
"He just said, 'Get back', pushed me and then hit me across the face."
Ms Fisher - who had been making her way to a vigil for Ian Tomlinson - added: "I started shouting at him saying, 'What are you doing hitting a woman?' and pointed at my face and said, 'Do you realise there are three film crews filming you?'.
"I was just so angry and shocked that he had done it and to be honest, I really didn't think he was going to get his baton out and hit me like he did."