The greatest determinant of survival in cardiac arrest is time to quality CPR and defibrillation - for every minute that passes, the chances of survival fall by 10 per cent.

Indeed, ambulance services have a target of 8 minutes to attend emergencies like these.

The GoodSAM App and platform has built a network of around 8000 such people across the UK and thousands more around the world.

GoodSAM is active globally and thanks to support from the innovation charity Nesta, it is also building a network of people across the UK that will help their community in times of life threatening emergencies.

If you are trained and can upload certification e.g.

HuffPost UK Tech is running a two-week focus on our Tech For Good campaign, which aims to highlight the technology that is driving social change and making a positive, long-lasting difference to our world.

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