The Welsh Ambulance Services NHS Trust () is the national ambulance service for Wales. It was established on 1 April 1998 and has 3,400 staff providing ambulance and related services to the 3 million residents of Wales. Organisation The trust headquarters is located at St Asaph, Denbighshire. The service is currently divided into three regions: Central and West Region – regional office at Swansea North Region – regional office at St Asaph South East Region – regional office at Cwmbran Services The trust provides a number of services: Emergency Medical Services (EMS) - responds to emergency 999 calls and GP's urgent calls. A standard crew combination for this service would normally consist of a paramedic and an emergency medical technician. However double paramedic / double technician crews are not uncommon. , the majority of the EMS fleet consists of Wilker Mercedes Benz 519 Sprinter Ambulances and Honda CRV or Ford Focus rapid response vehicles (RRV). Non Emergency Patient Transport Service (NEPTS) - deals with the planned care aspect of ambulance work. NEPTS staff usually provide transport between home and healthcare facilities or some inter-hospital transfers. Urgent Care Service (UCS) - bridges the gap between NEPTS and EMS, allowing for patients to be transferred between home and hospital or hospital to hospital while meeting the advanced needs that some of these patients may have (such as oxygen administration and continuous monitoring). UCS ambulance crews may also be allocated to EMS calls at times of high demand and following clinical telephony triage by a nurse or face to face triage by advanced paramedic practitioners or paramedic practitioners working from a RRV. NHS Direct Wales / 111 Wales - a 24-hour telephone and internet health advice service provided by NHS Wales to enable people to obtain advice when use of the national emergency telephone number (999 or 112) does not seem to be appropriate but there is some degree of urgency. NHS Direct Wales / 111 Wales supports EMS Operations by providing clinical triage for "Green 3" calls that are deemed suitable. More than 45% of 999 calls have a disposition of not requiring 999 conveyance. In addition during times of escalation other calls deemed suitable are triaged. It does not replace any of the existing emergency or non-emergency medical services but complements those already existing and enables callers who might not be fully able to diagnose themselves to be directed to care