It was envisaged that where necessary additional civil defence services would attend to incidents that adjoined their main area of operation. In London this worked well, but this worked less well in less populated areas. In 1940, Kent created mobile parties that would stationed in central areas and who could quickly move to where they were needed. From 1941, all regions were tasked with creating mobile Civil Defence Reserve parties. By 1943 some 14 mobile reserve units operated across 9 regions.
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