The Chimney Sweepers and Chimneys Regulation Act 1840 (3 & 4 Vict. c. 85) was an act of the Parliament of the United Kingdom passed to try to stop child labour. Many boys as young as six were being used as chimney sweeps. One of many chimney sweeps such as Newport, Isle of Wight's Valentine Grey, a 10-year-old, who was murdered by his master Benjamin Davis because he had failed to clean a chimney properly, forced the passing of the "Climbing Boys Act".
This act prohibited any person under 21 being compelled or knowingly allowed to ascend or descend a chimney or flue for sweeping, cleaning or coring.
Section 6 of the act was repealed by section 346(1)(b) of, and the fifth part of the third schedule to, the Public Health Act 1936 (26 Geo. 5 & 1 Edw. 8. c. 49).