Billy McGreanery was shot in Derry on September 14 1971.

The UK government is to challenge a critical court ruling on the Legacy Act.

Sir Declan Morgan said a Court of Appeal judgment had “clearly and unequivocally” endorsed the independence of the commission.

Different challenges against a High Court judgment on the contentious legacy laws were mounted by bereaved relatives and the UK government.

Sir Declan Morgan, from the Independent Commission for Reconciliation and Information Recovery, said it could have dealt with the 1989 murder case.

The ICRIR confirmed on Monday it had received 85 inquiries from families of Troubles victims.

One of the Labour government’s first steps will be repealing the policy to offer conditional immunity for Troubles crimes.

Northern Ireland’s former Lord Chief Justice, Sir Declan Morgan leads the new Independent Commission for Reconciliation and Information Recovery

Taoiseach Leo Varadkar said the ‘strong’ legal advice was that the legislation breached the UN Convention on Human Rights.

High Court judge Mr Justice Colton will hear the case at the Royal Courts of Justice in Belfast.

The Committee of Ministers expressed concerns that the act breached human rights obligations