You can partly chalk it up to simple geography. For one, the South is ground zero for American tea culture; sweetened iced tea is basically Southern culture in a glass. Ferguson also points to the ...

Blank Street claims that it sells some form of the green-tea-based drink “every four seconds” from its 80-odd shops in Britain and America (though it refuses to say how much that adds up to).

"This is the BEST American living in the UK by far." Another chimed in: "She's truly immersed into the culture omg." One user commented: "My nan's in prison because she missed the tea alarm." ...