Judgment in an appeal by the wife of solicitor Pat Finucane, challenging a decision by former prime minister David Cameron not to hold a public enquiry into the loyalist murder, is to be delivered next week.
Geraldine Finucane challenged the decision by Mr Cameron to deny an inquiry and instead hold a review of papers in relation to the murder.
Mr Finucane, (39) was murdered in his north Belfast home by members of the west Belfast UDA in February 1989.
Carried out by barrister Sir Desmond de Silva, the review published its findings in 2012 and confirmed agents of the state were involved and it should have been prevented - but ruled out an "overarching state conspiracy".
David Cameron acknowledged the "shocking" level of state collusion in an address to the commons after receiving the report, but ruled out a public inquiry.
Mrs Finucane challenged the decision to hold a review rather than an inquiry, arguing that the decision-making process "was a sham and had been frustrated".
She also argued that Art 2 of the European Court of Human Rights required a public inquiry to be held rather than the review established by the British government.
Last week the family met the Taoiseach Leo Varadkar in Dublin to ask for the Irish government's support for their campaign.
Speaking after the meeting, Mrs Finucane said: "It was a very positive meeting and we asked the taoiseach to reinforce the Irish government's commitment to our campaign and request for an inquiry into my husband's murder.
"He was more than happy to support us. We did ask him if he would come to Belfast to speak and he gave us a very positive response to that so we are very happy with the meeting".
The judgment in the appeal by Mrs Finucane will delivered at the Supreme court in London next Wednesday, February 27.
