The Auxiliary Fire Service (AFS) was first formed in 1938 in Great Britain as part of the Civil Defence Service. Its role was to supplement the work of brigades at local level. The Auxiliary Fire Service and the local brigades were superseded in August 1941 by the National Fire Service. After the war the AFS was reformed alongside the Civil Defence Corps, forming part of the UK's planned emergency response to a nuclear attack. It was disbanded in the UK in 1968.

The Civil Defence Service was a civilian volunteer organisation in Great Britain during World War II. Established by the Home Office in 1935 as Air Raid Precautions (ARP), its name was officially changed to the Civil Defence Service (CD) in 1941. The Civil Defence Service included the ARP Wardens Service as well as firemen, fire watchers, rescue, first aid post and stretcher parties. Over 1.9 million people served within the CD and nearly 2,400 lost their lives to enemy action.