The rally, which is scheduled to begin at 4 p.m. GMT, was organized by the Socialist Party of England and Wales.
“We will be handing in a letter of protest to show our disgust at this blatant attack on the democratic right to protest in Ireland,” the party wrote on its website Tuesday.
The party added that that further persecution of political activists in Ireland would be “met with a wave of protest internationally.”
The event will take place two days after four prominent opposition figures to Irish austerity measures introducing water charges were detained and interrogated by authorities in Dublin. The arrests were made in connection with an incident at a November protest, when a crowd of campaigners surrounded the car of a government minister, preventing her from moving for two hours.
The arrest sparked outrage among anti-austerity activists, who called it “pure political policing.”
Paul Murphy, a member of the Irish parliament who was among the four detained men, said the arrests were deliberately orchestrated to damage Ireland’s growing anti-water charges movement.
On Tuesday, a further four anti-water charges activists – including a 16-year-old boy – were arrested in connection with November's rally.
In November 2014, the Irish government passed new water charges, as part of austerity measures toward paying the $80 billion Irish bailout to the International Monetary Fund. The new fees will range from up to $200 a year for single people and up to $325 for families, according to government statistics.
Campaigners call the government’s policy double taxation as Irish citizens already pay taxes to maintain municipal water systems.
