London Ambulance Service NHS Trust

The London Ambulance Service (LAS) is the largest ambulance service in the UK, providing emergency (999) and urgent care services to a population of approximately 8–9 million people. The trust handles over a million 999 calls annually and employs several thousand staff, supplemented by volunteer community first responders.

Its operational capabilities include emergency ambulance response, paramedic and critical care, rapid response vehicles, and cycle response units. The organization is also responsible for major-incident preparedness and provides certain patient transport and urgent care services.

Headquartered in the Waterloo area of central London, the trust has operated in its current form since 1996. It is accountable to NHS England and is led by a chair and a chief executive.