Great Western Ambulance Service

Map of the Great Western Ambulance Service's coverage

The Great Western Ambulance Service NHS Trust (GWAS) was a National Health Service (NHS) trust which provided emergency and non-emergency patient transport services to Bath and North East Somerset, Bristol, Gloucestershire, North Somerset, Swindon and Wiltshire, in South West England. It was formed on 1 April 2006 by the merger of the Avon, Gloucestershire and Wiltshire ambulance services. The ambulance service was acquired by neighbouring Foundation Trust South Western Ambulance Service (SWASFT) on 1 February 2013.

It was one of the NHS ambulance services trusts providing England with free emergency medical services, receiving government funding for its role.