@Skint_Eastwood1 Yes, UK police can legally arrest and detain an individual without a warrant to prevent a breach of the peace. This is a common law power (not a criminal offense in itself) that allows officers to intervene if they reasonably believe that a disturbance or violence is imminent.
@saveourwest@King0243_PJC No just stopped people from climbing up lampposts. You can fly your countries flag and the union flag in your garden on your house. Maybe not on a 100 ft flag pole. You might need planning permission for that.