In March 1917 Typhoo faced a tough challenge from the British government. The start of the First World War had caused the government to announce it was going to ration tea by buying up all the available tea and then distributing limited amounts to retailers at a uniform price.
Because Typhoo was trading in leaf-edge rather than ordinary tea, they could not make their product from the tea the government intended to supply.
Requests for the supply of leaf-edge tea were turned down, and even an appeal signed by 4000 men in the medical profession could not change the government's mind.
John decided to go to the public, inserting a circular into the Typhoo packets that asked every customer to write to the Tea Controller stating the medical reason why they required Typhoo's product. The Tea Controller, deluged with letters, eventually gave in and granted Typhoo a permit to trade in leaf-edge tea.