Radical Islamist extremists and neo-Nazis could be banned from making public appearances, including on television, under a gagging order proposed by the Conservatives with echoes of the broadcast ban that once applied to the voice of Gerry Adams. Theresa May will announce the measure as part of a widely drawn counter-extremism strategy that is intended to catch so-called hate preachers such as Anjem Choudary, who was released on bail last week after being arrested on suspicion of encouraging terrorism. The home secretary’s new orders would be aimed at those who undertake activities ‘for the purpose of overthrowing democracy’, a wide-ranging definition that could also catch a far wider range of political activists. The ‘extremist asbos’ are reminiscent of the 1980s broadcasting ban under which Sinn Féin spokesmen such as Adams were banned from the airwaves. Actors were used to voice the words of republicans and others with links to paramilitary groups in news reports