Devon Freewheelers EVS, also known as the Blood Bikes provides a free out of hours courier service to the NHS across Devon. The service is provided mainly on motorbikes, ridden by volunteers. The Blood Bikes carry whole blood, blood and other medical samples, medication, emergency medical equipment, tissue samples for cross matching before transplant operations and donor breast milk for premature babies. The charity receives no funding from the NHS for this service and relies on public donations to be able to continue to operate.