Eirigi, the Republican protest group, is planning a series of street demonstrations in protest to the planned visit of Queen Elizabeth to Ireland in May.
Exact details of the Queen’s visit have not yet been released, but it is expected that the visit will most probably take place in May and will be confined to Dublin.
Senior police anti-terror officers have begun to draft contingency plans for the royal security, but detailed planning will not begin until an itinerary has been determined.
Eirigi warned this week that Queen Elizabeth was not welcome in Dublin and that plans for her visit would be vigorously opposed.
Brian Leeson, the chairman of the group said, “The last visit to Dublin by an English monarch took place 100 years ago. On that occasion, socialist republicans such as James Connolly and Constance Markievicz were to the forefront in opposing that visit.
"The reasons for their opposition are as valid today as they were then, and Eirigi will lead the opposition in exactly the same spirit."
Leeson claims that the royal visit was proposed to "normalize and legitimize the occupation of the six counties.
"As commander-in-chief of Britain's armed forces, she is the figurehead of those troops who currently occupy the six counties and who invaded and occupied Afghanistan and Iraq."
He added that the group were planning a protest outside the British Embassy in Dublin on Saturday, March 12.