Charles is set to face chants of 'Not my King' on the day of his Coronation as an anti-monarchy group stages the largest protest action in its history.
Graham Smith, Republic's chief executive, said activists will wear yellow T-shirts and carry yellow placards in groups along the procession route, and also gather for a major demonstration in Trafalgar Square on May 6.
He has vowed to make the peaceful demonstration unmissable and loud, but said they were not staging any Extinction Rebellion-style stunts because "it's not a good look" and "doesn't help the cause".
