The Taoiseach has warned the UK Government against acting alone on plans to deal with the legacy of the Troubles.

Britain plans to introduce an amnesty from prosecution for those who co-operate with a panel set up to investigate killings.

It will establish what it calls an Independent Commission for Reconciliation and Information Recovery, run by three commissioners appointed by the Secretary of State.

The move marks a departure from the 2014 Stormont House Agreement, which envisaged no type of amnesty for perpetrators.

Micheál Martin said any changes to the mechanisms agreed in the Stormont House Agreement should be made in conjunction with the Irish Government and the Stormont parties and involve "serious and credible engagement" with victims.

He was speaking before he addressed a commemoration to mark the 48th anniversary of the 1974 Dublin and Monaghan bombings.

Thirty three people died in the series of loyalist bomb blasts, three in Dublin city centre and one in Monaghan town.

Addressing the event at the permanent memorial on Talbot Street, Mr Martin said: "It has been our consistent position that the basis for progress on legacy is the Stormont House Agreement that was reached between the two governments and political parties back in 2014.

"Any attempt to depart from that agreement would need to be discussed by both governments and with all of the parties in an inclusive process.

"And there would need to be serious and credible engagement with victims and families."

Mr Martin, who laid a wreath at the commemoration, said the Government was committed to establishing the truth about the Dublin/Monaghan attacks.

He said it would work with the UK government to ensure an international, independent judicial figure could gain access to original documents related to the attacks.

"Those who perpetrated these hateful crimes in Dublin and Monaghan town set out to shatter our communities and sow discord," he said. "In this, they failed.

"The fact that we are gathered here today in solidarity almost half a century later is a powerful demonstration of that.

"That we successfully went on to forge a peace process and secure the Good Friday Agreement is testament to the commitment and resilience of all communities on this island.

"The Government I lead remains committed to seeking out the truth of these terrible events of that day and their aftermath.

"We do so to right a wrong and to try and bring closure to survivors and to victims' families. We stand in solidarity with them.

"We have raised these issues with the British government consistently, and at the highest levels - highlighting the three motions passed in the Dáil with the unanimous support of all shades of political opinion.

"We will continue to engage with the British government with a view to ensuring access by an independent, international judicial figure to all original documents relating to the Dublin and Monaghan bombings."

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Victims' support group reacts to proposal

Alan McBride of the Wave Trauma centre which works with bereaved families said they would examine the UK's new Troubles legacy legislation closely.

He said his organisation had held talks with the British government in recent months over the latest proposals.

But he said the amnesty idea put the perpetrators "in the driving seat" rather than relatives of the victims.

It would be up to those who had committed crimes to decide whether and to what extent they should engage in the process.

He questioned whether people who were involved in serious incidents decades ago had any incentive to come forward at this point.

Mr McBride said he believed there was still the possibility of criminal convictions, even years after murders.

Under the Good Friday Agreement, anyone convicted of a pre-1998 killing faces a maximum of two years' in prison.

Additional reporting: Conor Macauley