A quick thinking 4-year-old is being credited for using Siri to call for help when he found his mother unconscious.
"Hello, I'm Roman," the boy tells emergency services, who ask him to go and get his mother.
"We can't," he replies. "She's dead."
Roman used his unresponsive mother's thumbprint to unlock her iPhone and then asked Siri to call 999 (the British emergency phone number).
The young boy bravely followed the dispatcher's instructions, shaking his mother and yelling "Mummy," while help was on its way.
He recited their home address in Kenley, a south London district. Emergency services arrived within 13 minutes to give the mum first aid after she suffered a medical emergency.
"If you do nothing else today, then I'd implore any parents of young children to sit down with them and make sure they know what to do in this kind of situation and that they know how to contact police or other emergency services in an emergency," London Metropolitan police chief superintendent Ade Adelekan said.
"As this case demonstrates so poignantly, it could really be the difference between life and death."
Roman's mum has since been released from hospital and is back at home with her children.