What is English Afternoon tea?
Please see below from an article on  teaandcoffee.net .


  Breakfast tea blends tend to contain teas that produce a cup strong and robust enough to “get the body moving” in the morning, allowing you to start your day with a kick. Conversely, afternoon tea blends are designed to be lighter in character and tend to be smoother on the palate, creating the perfect feel for a day winding down.


There is more to read and some very interesting information on the subject. You may want to take a look at the page.