Northern Ireland Secretary Brandon Lewis will today announce whether the government will hold a public inquiry into state collusion in murder of lawyer Pat Finucane during the Troubles

Grieving relatives of murdered Belfast solicitor Pat Finucane will learn today if their 31-year battle for justice could be finally won.

The UK Government will later announce whether it will hold a public inquiry into the killing of the lawyer.

Northern Ireland Secretary Brandon Lewis will tell the solicitor's family how the state will respond to a court judgment that found it had failed to hold an 'effective investigation' into his death at the hands of loyalist paramilitaries.

Mr Finucane, a 39-year-old solicitor who represented both republican and loyalist paramilitaries during the Troubles, was shot dead in his family home in north Belfast in February 1989 by the Ulster Defence Association in an attack found to have involved collusion with the state.

Mr Finucane's widow Geraldine and the couple's three children have been campaigning for decades for a public inquiry to establish the extent of security force involvement.

Last year, the Supreme Court said all previous examinations of the death had not been compliant with human rights standards.

Solicitor Pat Finucane, 39, was shot by loyalist paramilitaries in front of his family in 1989

The court acknowledged Mrs Finucane had been given an 'unequivocal undertaking' by the Government following the 2001 Weston Park agreement that there would be a public inquiry into the murder.

However, the Supreme Court judges found that the Government had been justified in later deciding against holding one.

The court said it was up to the Government to decide what form of investigation was now required, if one was feasible.

Amid a Government delay in responding to the judgment, Mrs Finucane took fresh judicial review proceedings against the state.

John Finucane and Geraldine Finucane, son and widow of the late Pat Finucane

How and why was Pat Finicane murdered?

Pat Finucane was shot dead in front of his family in February 1989 by loyalists in an attack found to have involved collusion with the state.

The 39-year-old was shot 14 times while enjoying Sunday lunch at home with his family.

Previous investigations into the killing have already found that forces colluded in his murder.

Then it was discovered that two agents within the paramilitary group the Ulster Defence Association had been working for the army and the police.

The pair had played a crucial role in deciding to select Mr Finucane to be murdered and even supplied on of the guns

Another probe found out MI5 had ignored intelligence he was under threat.

The revelations saw then Prime Minister David Cameron issue an apology for 'frankly shocking levels of collusion'.

Last month, Mr Lewis's lawyers gave a High Court judge in Belfast a commitment that a decision would be announced by November 30.

The Secretary of State will inform the Finucane family of his intention on a virtual call on Monday afternoon. 

Ahead of that conversation, Sinn Fein has warned that failure to order a public inquiry will have profound implications for confidence in the rule of the law.

Party vice president and Stormont Deputy First Minister Michelle O'Neill said Monday would be a 'day of reckoning' for the Finucane family.

'The British government's approach of delay and denial has literally run out of road,' she said.

'It is a matter of huge public interest that there is full and maximum disclosure around questions about who ordered the killing, about who knew what, and when.

'Those involved must be held accountable. Until now there has been virtual impunity for the British state agencies and actors involved in the killing.

'Any attempt by the British government to ignore the family, political and wider public demands for a public inquiry will have profound and fundamental implications for confidence in the rule of law, the administration of justice and the wider approach to legacy.

'Now is time for the British government, and the British Secretary of State Brandon Lewis, to finally listen to the Finucane family and call a public inquiry as a matter of public interest. 

'Any attempt by the British government to ignore the family, political and wider public demands for a public inquiry will have profound and fundamental implications for confidence in the rule of law, the administration of justice and the wider approach to legacy. 

Mr Finucane's relatives at Government Buildings in Dublin, after meeting with the Taoiseach

Troubles investigations 

A new police unit was set up in 2016 to investigate every British Army killing during the Troubles.

The taxpayer-funded Legacy Investigation Branch is re-opened 238 'fatal incidents' involving 302 deaths.

It took over from the Historical Enquiries Team, set up in 2006 but disbanded six years later following budget cuts and a critical report.

MPs and military chiefs have condemned as 'disgraceful' the decision to re-examine cases dating back nearly 50 years.

There have been fears that up to 1,000 former soldiers now in their 60s and 70 could face investigations over their actions at the height of the IRA's terrorist campaign as a result. 

'Now is time for the British government, and the British Secretary of State Brandon Lewis, to finally listen to the Finucane family and call a public inquiry as a matter of public interest.

'There can be no further delay.'

Former prime minister David Cameron decided not to hold a public inquiry into the murder, but instead ordered a review of all the files related to the case by former UN war crimes prosecutor Sir Desmond de Silva QC.

Sir Desmond found significant levels of state collusion involving the Army, police and MI5 but said there was no evidence of an 'overarching state conspiracy'.

His findings prompted Mr Cameron to apologise to the Finucane family for 'shocking levels of collusion'.

However, Mrs Finucane branded the de Silva report a 'whitewash'.

Last week, three other Stormont parties – the SDLP, Alliance and Greens – joined Sinn Fein in writing to Mr Lewis to demand a public inquiry.

The Irish Government also called on its UK counterparts to order a probe, as did 24 members of the US Congress.

Mr Finucane's son John, a solicitor and Sinn Fein MP for North Belfast, tweeted on Sunday evening:

'Tomorrow my family & I will hear the British Govt response to our Supreme Court victory regarding an inquiry into my father's murder.

'In advance I wish to thank everyone across Ireland & internationally, for the incredible support you have given us. We deeply appreciate it.'