Coming through #Dartford station this evening (7pm) I witnessed a young boy of colour being held face down to the ground by multiple railway enforcement officers and an undercover police officer. He was shouting, clearly distressed, and appeared to be crying. I was told by a member of #Dartford station staff "not to worry," the boy had "assaulted a member of staff" I was encouraged to leave, told the police were on their way. A member of station staff jokingly laughed to another that the boy "apparently already has 9 arrest warrants!"