“A video shows thousands of people marching through central London recently.”

Multiple independent investigations by the fact-checking organization Full Fact have confirmed that viral videos appearing to show large crowds marching through central London in September 2026 are AI-generated. These videos contain technical indicators of synthetic media, such as the presence of a 'SynthID' watermark (a tool used to identify Google-generated AI content) and visual artifacts like figures merging into one another and distorted architectural features. There is no credible evidence or reporting from reputable news outlets to support the claim that such a march occurred in London during the period these videos were shared.