Large groups of teenagers have caused disorder in several UK cities following a growing social media trend encouraging youths to 'link up' in large numbers. In Birmingham and parts of London, including Clapham, hundreds gathered, leading to scenes of chaos, shop closures, and frightened residents seeking refuge indoors. Witnesses described large groups of masked youths running through streets, clashing with police and each other, and intimidating members of the public. Fires were reportedly started using fireworks, and several arrests were made for offences including shoplifting and assault. Local residents and businesses were left shaken by the scale and unpredictability of the unrest. Political leaders, including MPs and the London Mayor, strongly condemned the behaviour, calling for increased policing, arrests, and stronger preventative measures. Authorities have pledged a heightened police presence to restore order and reassure communities. See