Anti Social Behavior/Rough Sleeping/Threatening/Trespass

A group of 20/30 Foreign homeless people (the Oxford Street begging gang) are living in Cavendish Square. They are loud and threatening, they are cooking and urinating in the square and are always there after the square has been closed for the night. They are storing their bedding on top of the QPark building on the NE corner of the square and climbing up on two electrical cabinets to retrieve it each evening. They are present during the day and their behaviour is such that they are unapproachable and threatening.