Rats, to the lay mind, would appear to be trivial things to warrant special legislative measures, but so it is that, in 1919, the Rats and Mice Destruction Act came into force compelling occupiers of land and buildings to take measures for the destruction of rats and mice, under a penalty of £5 for failure to comply with the provisions of the Act after receiving the first notice, and £20 if the notice is still ignored.

Extensive experiments are perpetually being made by the Zoological Society in conjunction with the leading scientists for the most efficient means of destruction without causing danger to other animals or to children and with a minimum of inconvenience. Local Authorities have powers for advising those under their control the most up-to-date methods of destruction, and the latest formulas are always at the disposal of the inquirer.

Under the Act, not only must the pests be destroyed, but means must be found for making premises rat and mouse proof, by stopping up all holes and means of access and nesting, clearing away garbage periodically, and keeping food in vermin-proof storage.