Ex-IRA and INLA prisoners will join members of the 32-county Sovereignty Movement and Irish Republican Socialist Party, former members of Ogra Sinn Fein and Noraid, and unaligned republicans at the gathering in the Ancient Order of Hibernians' hall on Saturday.

Some Republican Sinn Fein members will also attend in a personal capacity.

The meeting will be chaired by former Sinn Fein Assembly member John Kelly.

It has been organised by Danny McBrearty, an ex-IRA man who has been imprisoned in Britain, Ireland, and the US. McBrearty's brother George, an IRA member, was shot dead by the SAS.

McBrearty said events at Stormont on Tuesday would show "yet again that Sinn Fein has accepted partition and the British occupation of our country". He said:

"Sinn Fein is a constitutional nationalist party now, it is the new SDLP. But some of us have retained our beliefs. The Brits haven't gone away and neither have republicans.

"Our opposition so far has been fragmented and disparate but we hope we can now agree on a strategy to move forward together.

There is much more that unites than divides us.

"It is time to put away egos and elitism, to stop nit-picking on minor issues and to build an alliance which can mount a credible republican challenge to the Good Friday and St Andrews' agreements.

"Republicans oppose the PSNI-RUC, republicans oppose MI5 in Ireland, republicans oppose Stormont rule and we are proud to oppose it."

McBrearty said such opposition was "a legitimate viewpoint and does not mean we want a return to conflict".