Bottles and beer cans are now being thrown by rival EDL and anti-fascist protesters facing off in Whitehall, ITV News reporter Ben Chapman says.
Police in riot gear are now moving into the area between the two groups.
More top news
Wet, windy weather with milder nights
X Factor judge Rita Ora was booed for her decision-making during the show's Six Chair Challenge.
Samantha Hayes, 30, and her son Liam were last seen around 5.20pm on Friday afternoon.