Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,111 pages of information and 233,636 images on early companies, their products and the people who designed and built them.
of 168-170 Stockwell Road, London, W9. Telephone: Brixton 6426-7 (1947)
Centre of Maidenhead, Berkshire (2007)
1924 A small company was set up by Harold Maxwell-Lefroy, professor of entomology at Imperial College London, and his assistant Elizabeth Eades who had developed an anti-woodworm fluid called Ento-Kill. Since a similar name had already been registered as a trade name, Lefroy instead named his insecticide Rentokil.
1925 Lefroy was killed in his laboratory (one source says due to exposure to insecticide; another says due to a fire); his assistant Elizabeth Eades took over the company. By providing a reliable service, the company soon started to grow.
1926 The Rentokil company was incorporated as a private company.
1939 When war broke out, measures were needed to protect the nation's dwindling food stores, which could not afford any losses to pests. Rentokil began offering its own extermination services.
In the post-war years, Rentokil continued to thrive, gradually expanding into other businesses.
1947 British Industries Fair Advert as Manufacturers of: Insecticides; Germicides; Insect Repellent and Powders; Timber Fluid for the destruction of Wood Worm. Furniture Cream, Dry Cleaner, Pets Insect Powders, Biting Insect Repellent, Mothproofer. (Chemicals Section - Olympia, Ground Floor, Stand No. A.1133) 
1952 The subsidiary Woodworm and Dry Rot Control Ltd. was established to bring together the work on woodworm and dry rot control
1960 The combined company was reorganized, adopting the new name of Rentokil Group Ltd.
1962 The main UK subsidiary, Chelsea Insecticides was renamed Rentokil Laboratories Ltd.
1969 Public company. Offer of ordinary shares.
1978 After controlling shareholder Sophus Berendsen sold a few shares the company was no longer a "close" company
1989 Sophus Berendsen still owned 55 percent of the shares