Would it have anything to do with the fact that among those taking part in this 'memorial service' was Rev David Armstrong?
David Armstrong, who spoke and led in prayer, is well known as the Presbyterian minister whose pursuit of ecumenism in Limavady in the mid-1980s caused him to leave the town. The Free Presbyterian Church were among those who protested against his ecumenical actions back then.
He was present and took part in this memorial service as he now resides in the town and was deputising for the Mayor's chaplain.