This is the moment a brave six-year-old boy saved his mum's life by dialling 999.br br Heroic Henry was alone with his diabetic mum when she fell into a coma - but the quick-thinking tot called for help.br br Mum Bethany is a Type One diabetes sufferer who has four injections a day.br br She collapsed at home in January - but had fortunately taught Henry what to do in an emergency situation.