Police have released fresh images of people they want to trace in connection with the violent disorder after last month's mass protest against the Government's public spending cuts.
Groups of activists clashed with riot police in central London as a separate TUC-organised demonstration and rally at Hyde Park passed off peacefully.
Banks and shops were targeted, while buildings and landmarks in Trafalgar Square, Piccadilly and Oxford Street were vandalised amid the trouble on Saturday March 26.
The Metropolitan Police want to identify new individuals from the close-range shots, which capture men in hooded tops and also include one woman with a painted clown face.
Detective Chief Superintendent Matthew Horne, who is is leading the investigation, named Operation Brontide, said: "Appalling acts of violence were committed on the day of the TUC march and there is an extensive operation under way to identify those responsible."
Organisers estimated between 400,000 and 500,000 teachers, nurses, firefighters, council and NHS workers, other public sector employees, students, pensioners and campaign groups converged on the capital for the peaceful protest.
Anyone with information is asked to contact the Operation Brontide team on 020 8246 9386 or Crimestoppers on 0800 555 111.
