The Metropolitan Police has been criticised for saying they will "deal robustly" with anyone "undermining celebration" at the King's Coronation this weekend.
At least 1,700 people will gather for a demonstration in Trafalgar Square on Saturday, wearing yellow T-shirts and carrying placards in groups along the procession route.
In a statement, the Metropolitan Police said: "Our tolerance for any disruption, whether through protest or otherwise, will be low. We will deal robustly with anyone intent on undermining this celebration."