More than 100 pupils from across London descended on a scouts park in Bounds Green for a national first aid competition.
The competition, run by St John Ambulance, saw pupils from 12 primary and secondary schools come to Bounds Green Scout Park, in Gordon Road, to pit their skills against each other in a series of real life scenarios.
The scenarios included emergencies including major bleeding, asthma attacks and unconsciousness.
The winners from the primary and secondary school sections will enter the national final at Drayton Manor theme park next month.
Mary Smith, project manager at St John Ambulance London, said: "More than 470 schools across London have signed up for their pupils to learn emergency life support skills so it’s wonderful to see these skills put to the test in real life emergency scenarios.”
"We know from our work teaching life-saving skills in schools that it’s crucial we equip youngsters in this way so that they can pass on their skills to the community. It’s incredible when I hear first hand the stories of our young people using their skills to help people in an emergency."
Other activities included cardio-pulmonary resuscitation demonstations and defibrillator practice.