In the United Kingdom, fire service co-responders are

firefighter A firefighter is a first responder and rescuer extensively trained in firefighting, primarily to extinguish hazardous fires that threaten life, property, and the environment as well as to rescue people and in some cases or jurisdictions also ...

s who also respond to

ambulance An ambulance is a medically equipped vehicle which transports patients to treatment facilities, such as hospitals. Typically, out-of-hospital medical care is provided to the patient during the transport. Ambulances are used to respond to medi ...

calls. The aim of a co-responder team is to preserve life until the arrival of either an ambulance or a response vehicle from the NHS ambulance service. Co-responder vehicles are equipped with oxygen and automatic external

defibrillation Defibrillation is a treatment for life-threatening cardiac arrhythmias, specifically ventricular fibrillation (V-Fib) and non-perfusing ventricular tachycardia (V-Tach). A defibrillator delivers a dose of electric current (often called a ''cou ...

(AED) equipment. This is a similar but different role to community first responders, who have a similar role but do not work for the fire service.

References

Fire and rescue service organisation in the United Kingdom {{UK-stub