The UK Prime Minister has said that his government is "fully considering" the ruling of the Court of Appeal in Belfast, which found that an independent public inquiry into the murder of GAA official Sean Brown must be established without further delay.
Mr Brown was chairman of Bellaghy Wolfe Tones GAA in south Derry and was locking up the gates of his club when he was assaulted, abducted and murdered by a loyalist gang in May 1997.
The 61-year-old father of six was taken to a remote country lane outside Randalstown and shot six times.
No one has ever been convicted of his murder, which was carried out by the Loyalist Volunteer Force, a breakaway faction of the UVF.
His family has alleged that agents working for RUC Special Branch were involved in the killing and that the investigation was deliberately hindered in order to protect them.
During an appearance before the UK Parliament's Liaison Committee today, Keir Starmer reiterated that the government wants to see a "full investigation" into Mr Brown's murder.
It followed questions from the Chair of the Northern Ireland Affairs Committee, Tonia Antoniazzi.
She told the committee that Mr Brown's family have been waiting 28 years for truth and justice in relation to his murder.
"The coroner couldn't move on last year, Prime Minister, because material was being withheld on grounds of national security.
I've met Mrs Brown and her daughters. They showed me 56 pages of blocked-out text with not one word on any of them," she said.
Ms Antoniazzi told the committee that the UK government has been instructed twice to hold a public inquiry into his murder.
Read more: Public inquiry into Sean Brown murder needed without delay, NI Court of Appeal says
On the broader issue of legacy, Ms Antoniazzi said that the Northern Ireland Affairs Committee has heard from many victims and stakeholders, and it was clear that the Irish and UK governments were not doing enough to address legacy issues.
The Prime Minister said that after working as a human rights adviser in Northern Ireland, he knew how "acutely" these issues "are felt in all communities".
Mr Starmer said he believed relations between the UK and Republic of Ireland are in a "much better position", and he hoped to work closely with the Irish Government on the area of legacy.
He said that he knows "first hand" that the Independent Commission for Reconciliation and Information Recovery (ICRIR) must have the confidence of victims.
The UK government has rejected calls from many to scrap the commission entirely.
