Thousands of people take part in separate, rival rallies in central London, according to reports from multiple outlets. The demonstrations take place along London streets, with both gatherings drawing large crowds. Coverage across sources describes the turnout as in the tens of thousands, indicating substantial public participation in the same general period and city. Although the specific causes and organisers of each rally are not detailed in the provided excerpts, all accounts agree on the core circumstances: large crowds march through London, and the demonstrations are positioned as rivals or competing events rather than a single coordinated protest. The reports emphasise the scale and the public visibility of the marches, rather than detailing individual incidents or outcomes. Overall, the sources align on that the rallies occur in London, involve large numbers of participants, and include two competing marches happening in parallel or close succession.