Johnathan Ball, three, and Tim Parry, 12, were killed when bombs planted in litter bins in Warrington’s main shopping area were detonated shortly after midday on a Saturday afternoon.
No warning was given and no one has been prosecuted for the attack on March 20, 1993, that left 56 injured.
Johnathan, three, was in the town with his babysitter to buy a card for Mother’s Day, the next day, when he was killed.
Teddy bears and flowers form a shrine to victims of the 1993 Warrington bombings
Tim, an Everton fan, had been shopping for football shorts when he caught the full force of the explosion. He died in his father’s arms five days later in Liverpool’s Walton Hospital.
The death of the two boys sparked a public outcry in the UK and on both sides of the border in Ireland.
Three years after the blast their families unveiled the Fountain of Life in the town centre, including photographs on bronze of the boys.
Tim’s parents set up the Tim Parry Johnathan Ball Foundation for Peace, which has since become an internationally recognised centre for conflict resolution and victim support.