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The Pest Detectives: The Definitive Guide to Rentokil by Rob Gray

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Secreted in the vaults

Much like the closely guarded recipe for Coca-Cola, for many years Thomas Harley kept its formula for Rodine safely under lock and key in a bank vault. In the Rentokil archive there’s a receipt from Union Bank of Scotland dated 16 June 1933 for the safe keeping of the sealed envelope containing the formula. More intriguingly, there’s the envelope itself. On its front, typewritten above four signatures it reads: This envelope contains the details of the Formula and Method of Manufacture of Rodin Rat Poison and other Proprietaries. Turn the envelope over and there are two wax seals. Pristine, unbroken. Over the years, people have shown a lot of self-restraint.

It would be stretching it to say the same for the major Rentokil ...

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