Twinings is a tea brand whose official history traces Thomas Twining’s London tea business to 1706. It describes the present company as developing blends near its global headquarters outside London and selling tea varieties across markets. That is a history of the brand; it does not mean that tea leaves in each blend are grown in Britain. Twinings History.
For a shopper, the useful distinction is the exact blend and format. Twinings’ North American English Breakfast page lists black teas from several growing regions and offers different pack counts. This branded blend is different from English Breakfast Extra Strong and from non-black-tea lines. The company’s sensory descriptions are its own formulation claims and have not been taste-tested by Olive Branch.