What brand is credited with introducing tea bags to the UK in 1953?

Tetley is a beverage manufacturer founded in 1837 in Yorkshire, England. It is the largest tea company in the United Kingdom and Canada, and the second-largest in the United States by volume. Tetley's manufacturing and distribution business operates in forty countries, selling over sixty branded tea bags. Since 2000, Tetley has been a wholly-owned subsidiary of Tata Global Beverages (formerly Tata Tea), headquartered in Kolkata, making it the second-largest manufacturer of teas in the world, after Unilever.

In 1822, brothers Joseph and Edward Tetley sold salt from a pack horse in Huddersfield, Yorkshire, England. They started to sell tea and were so successful they set up as "Joseph Tetley & Co." tea merchants in 1837. Relocating to London in 1856, they set up as "Joseph Tetley & Company, Wholesale Tea Dealers".

In 1952, in an early example of cross-promotion, Petula Clark's single "Anytime Is Tea Time Now" was used to advertise Tetley on Radio Luxembourg. 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.