Knowing what to do in a cardiac arrest can make a lifesaving difference.
During Resus Annie on Tour, we've been speaking to members of the public about how confident they would feel stepping forward in an emergency.
If someone collapses and is unresponsive, call 999 immediately. The call handler will guide you through what to do, including how to assess for signs of life, perform CPR, and find the nearest defibrillator.