Tetley is a beverage manufacturer founded in 1837 in Yorkshire, England. Tetley's manufacturing and distribution business operates in forty countries, selling over sixty branded tea bags.

Since 2000, Tetley is a wholly owned subsidiary of Tata Global Beverages (formerly Tata Tea), headquartered in Kolkata, India, making it the second-largest manufacturer of teas in the world, after Unilever.

Tetley was the first company to sell tea in tea-bags in the United Kingdom in 1953. In 1989, following extensive consumer tests establishing Britons' preferences, Tetley launched the round tea bag.

The Tetley Group was created in July 1995, as a result of a buy in management buy out, when a group of investors bought the worldwide beverage business from Allied Domecq. The Tetley Group was bought by India's Tata Group in February 2000, for £271 million.

Tata Group is one of India's largest business conglomerates, comprising more than one hundred companies, including Tata Global Beverages. The acquisition has helped Tata's business ambitions to hold a global tea company.

As India reduces import duties on tea, Tata Global Beverages has offset its reduced share of the domestic market by gains in Europe and North America.

In April 2014, Columbia Law School and The Guardian reported that some of Tetley's tea is harvested by workers who do not receive the minimum wage in India. Tata Global Beverages markets tea under the major brands Tata Tea, Tetley, and Good Earth Teas.

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