 Even into the late twentieth century, with some centralisation of control and classification of vehicle types such as Motor Ambulance Units (the title arising historically as a distinction from horse-drawn units), First Aid Posts and Rapid Deployment Vehicles, there remained within the organisation an enormous range of deployed vehicles of different types and even assorted local vehicle liveries.Some ambulances were donated second-hand from industrial plants, some were purchased (from different suppliers) and some were local conversions of commercial vehicles.At the start of the twenty-first century, new legislation regarding emergency ambulances effectively rendered a significant proportion of the then current St John Ambulance fleet redundant.