PACIFISTS WILL be pleased to hear that conscientious objectors (COs) have not been forgotten amid the many events marking the centenary of the First World War. Many of the 20,000 COs were motivated by faith, and the international Catholic peace organisation Pax Christi was one of a number of bodies, including Quaker Peace and Social Witness, that coordinated a ­gathering of descendants of 50 COs due to take place on Thursday in central London, marking International Conscientious Objectors Day.At the ceremony in Tavistock Square, family members were asked to bring photographs and flowers for COs including the Welsh brothers Alfred Llewelyn Roberts and Walter Roberts, the latter being the first CO to die a prisoner at Dyce Quarry near Aberdeen; Emmanuel Ribeiro who, while held in Warrin