Packing tea in London 1910. Note the child labor also at work on the benches. A succession of laws on child labour, the so-called Factory Acts, were passed in Britain in the 19th century. Children younger than nine were not allowed to work, those aged 9–16 could work 16 hours per day per Cotton Mills Act. In 1856, the law permitted child labour past age 9, for 60 hours per week, night or day. In 1901, the permissible child labour age was raised to 12.