Violence erupts on the London Underground after an argument between a white woman and a black teenager gets out of hand. Video footage captured on a mobile phone shows the pair arguing after the woman accused the man of stepping on her foot. The two exchange insults, with the woman calling him a ‘smelly Nigerian’ before he calls her a ‘white princess’. As the argument escalates, the man stands over her and is seen throwing punches at her before other passengers drag him off her as he accuses her of hitting him with a bottle.