large crowd of people protesting or demonstrating in an urban environment

large crowd of people protesting or demonstrating in an urban environment. Many of the people in the crowd are holding and waving Iranian flags, indicating the protest is likely related to Iranian politics or issues. The location seems to be a city with recognizable architecture, possibly London, UK, given the buildings' style and the presence of a monument similar to a statue. The crowd is dense, with individuals of various ages and ethnicities, and they appear to be engaged in chanting or cheering, suggesting a unified purpose. The video is handheld and slightly shaky. The time of day appears to be evening or early morning.