<Ul> <Li> ITUC </Li> <Li> IWA </Li> <Li> WFTU </Li> </Ul> <Tr> <Td> Strike action (show) <Ul> <Li> Chronological list of strikes </Li> <Li> <Ul> <Li> General strike </Li> <Li> Secondary action </Li> </Ul> </Li> <Li> <Ul> <Li> Sitdown strike </Li> <Li> Work - to - rule </Li> </Ul> </Li> </Ul> </Td> </Tr> <Ul> <Li> Chronological list of strikes </Li> <Li> <Ul> <Li> General strike </Li> <Li> Secondary action </Li> </Ul> </Li> <Li> <Ul> <Li> Sitdown strike </Li> <Li> Work - to - rule </Li> </Ul> </Li> </Ul> <Li> Chronological list of strikes </Li>

When did the 40 hour work week start