Here's an except from the Twinings website.
Fine black tea expertly blended with the citrus fruit flavor of bergamot, to deliver an uplifting tea with a unique floral aroma and refreshing taste.
Twinings has been blending my family tea for years. Today, I am proud to continue this tradition with the tea celebrated throughout the world known as Twinings Earl Grey. Legend has it, that my ancestor, the second Earl Grey, was presented with this exquisite recipe by an envoy on his return from China.
Light Flavour Strength