Yes,British are noted for dry humor, that is, when the speaker says something funny in a casual way and with a straight face. The British are fond also of the understatement. In this regard, the book Humour in Memoriam by George Mikes says: “Understatement is not simply a manner of making jokes; in England it is also a way of life.
Other people use understatement too—the English do not own the copyright. A cartoon in the New Yorker showed two men on the flying trapeze and one has just missed the other’s hand, ninety feet up in the air. The man who made the somewhat absentminded mistake said: ‘Ooop, sorry.’ Surely, an understatement and an American understatement at that. But in other countries understatement is casual, incidental; in England it flows from the national character; it is in the air. It is, more often than not, not even meant as a joke.”