The protests in London today are primarily focused around a large far-right anti-immigration rally called the "Unite the Kingdom" march organized by Tommy Robinson. The main events are taking place in central London, with huge crowds marching through areas including Westminster Bridge, near the Houses of Parliament, Whitehall, Bridge Street, and Parliament Square. Tens of thousands to over 110,000 people are reported to be participating. There is also a counter-protest by anti-racism groups such as "Stand Up to Racism," with about 5,000 attendees, located near Whitehall but separated by police barriers from the far-right protesters. The protests have seen intermittent clashes, including attempts by some far-right demonstrators to breach police barriers, throwing of projectiles at police, and resulting in injuries to at least 26 officers and multiple arrests. The atmosphere is tense, and the Metropolitan Police have deployed mounted reinforcements and riot gear to manage the crowd. Key protest locations:

• Central London streets, including areas around Westminster Bridge, the Houses of Parliament, Whitehall, Bridge Street, and Parliament Square.
• Counter-protest near Whitehall.

The main rally is against immigration, with slogans and placards demanding measures such as expelling asylum seekers arriving by small boats. The event is described as one of the largest right-wing demonstrations in recent UK history. This information is from news reports covering events on Saturday, September 13, 2025, which is the most current update available for protests occurring "today" in London given the time zone overlap.