Police made several more arrests after a group of EDL supporters made their way back to Downing Street before being dispersed by police.
Scotland Yard said a total of 13 people had been arrested for a range of public-order offences throughout the day.
The figure is thought to include both EDL supporters and anti-fascist protesters.
More top news
A 35-year-old and a 27-year-old man, both from the Birmingham area, have been arrested and remain in police custody.
Molly Owens, was reported missing on Friday and is believed to be with her father, who is wanted after failing to appear in court.
Former Diversity dancer Robert Anker has died in a car crash in Canada.