The term London-based tea giant refers to the company Tetley, a 6 letter word. Tetley is a British beverage brand that was founded in 1837 and is now owned by Tata Global Beverages. It is the largest tea company in the United Kingdom and one of the biggest tea companies in the world. The company produces a wide range of tea products, including black tea, green tea, herbal tea, and specialty teas.