A dad whose son died during a school swimming race has welcomed the start of the rollout of lifesaving defibrillators for every school.
Campaigner Mark King said the move would mean lives are saved so "families do not have to suffer the heartbreak of unnecessarily losing a child".
Oliver, 12, a pupil at King David High School in Childwall, Liverpool, died from Sudden Arrhythmic Death Syndrome (SADS) in March 2011.