I did 10 hour shifts 1 hour or 1 hour banked for a few years from 4am. The latest start time to avoid being stuck behind a 4 day long train and get home before traffic hits standstill for hours that worked for everyone that needed to be on site for the same shifts. Probably something similar I’d say because while the shifts were different in later jobs many featured seasonal meetings to discuss adjusting the shift times for the same reasons.
I did 10 hour shifts 1 hour or 1 hour banked for a few years from 4am. The latest start time to avoid being stuck behind a 4 day long train and get home before traffic hits standstill for hours that worked for everyone that needed to be on site for the same shifts. Probably something similar I’d say because while the shifts were different in later jobs many featured seasonal meetings to discuss adjusting the shift times for the same reasons.