Pimm's No. 1 was created in the mid-19th century by James Pimm, a farmer's son from Kent who became the owner of an oyster bar in London. Pimm offered his concoction as a digestive aid, serving it in a small tankard known as a 'No. 1 Cup', hence the name. Its popularity grew rapidly, and it became a symbol of British summertime, associated with social events like garden parties, cricket matches, and the Henley Royal Regatta. Its historical significance lies in its status as a quintessential British drink that encapsulates the spirit of British social traditions and leisure.