This technical report describes the identification of shift systems wo
rked by industrial shiftworkers in England, Scotland and Wales. A dive
rse range of shift systems were reported to be in operation across 27
industrial sectors. Companies employed up to 14 different shift system
s at a particular site, The numbers of shiftworkers on a given shift s
chedule ranged from 1 to 2977, Most systems employed fewer than 100 pe
ople, The majority of rotas were regular, rotating systems. The most c
ommon shift durations were 8 or 12 h. Compared to earlier surveys of s
hiftwork prevalence in certain industries there appeared to be a subst
antial increase over the past 3 decades in the proportion of the workf
orce who work shifts. Information about the average numbers of hours w
orked per week on major system types is given. In addition, data for t
he range of shifts per cycle, the distribution of shifts and distribut
ions of their start and end times are presented. (C) 1998 Elsevier Sci
ence Ltd. All rights reserved.