The High Court in London has ruled that Donegal man John Downey was responsible for the 1982 Hyde Park bombing which killed four British soldiers.
Downey (67), who has an address in Creeslough, was found to be an “active participant” in the IRA attack on military members.
Relatives of the four Royal Household Cavalrymen who died in the July 1982 blast have won a civil action against Downey, which was brought to court following the collapse of a criminal case in 2014.
Mrs Justice Yip ruled on Wednesday that the Hyde Park bombing was “a deliberate, carefully planned attack on members of the military.
“I have found that the defendant was an active participant in the concerted plan to detonate the bomb, with the intent to kill or at least to cause serious harm to members of the Household Cavalry.”
Squadron Quartermaster Cpl Roy Bright, aged 36, Lt Dennis Daly, aged 23, Trooper Simon Tipper, aged 19, and L/Cpl Jeffrey Young, aged 19 were killed by a car bomb packed with nails as they rode past on their way to the changing of the guard at Buckingham Palace.
Downey, who did not appear in the London court, filed a defence denying any involvement in the attack.
Downey is currently in custody facing other charges for the murder of two UDR soldiers in an IRA bomb attack in Enniskillen in 1972.