What was the law passed in 1842 which made it illegal for young children to work?

The law passed in 1842 that made it illegal for young children to work was the Mines Act. This legislation prohibited the employment of boys under the age of ten and girls of any age in underground coal mines in the United Kingdom. The act aimed to improve working conditions and address the exploitation of child labor during the Industrial Revolution. It marked a significant step towards the regulation of labor practices and the protection of children's rights.