Jack Crozier, 27, lost his sister Emma in the Dunblane massacre on 13 March 1996 and told on Lorraine we should remember lessons learned 25 years ago after 17 lives were lost.
What happened in Dunblane?
Thomas Hamilton, a 43-year-old shopkeeper who lived in the town, entered Dunblane Primary School on the morning of 13 March 1996.
Armed with four handguns and 743 rounds of ammunition, purchased legally under the UK firearm laws at the time, he made his way to the school gym where teacher Gwen Mayor was teaching her primary one pupils.
Over the course of four minutes, Hamilton opened fire on the class of children, shooting 32 people.
PE teacher Eileen Harrild and teaching assistant Mary Blake were injured but managed to shelter as many children as they could inside a gym cupboard while Hamilton fired shots.