In the United Kingdom, fire service co-responders are

firefighter A firefighter (or fire fighter or fireman) is a first responder trained in specific emergency response such as firefighting, primarily to control and extinguish fires and respond to emergencies such as hazardous material incidents, medical in ...

s who also respond to

ambulance An ambulance is a medically-equipped vehicle used to transport 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 ...

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). Defibrillation delivers a dose of electric current (often called a ''count ...

(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