I’ll go first…The Office.
Now I know the two shows are fundamentally quite different, but they adapted what was already a very successful show, and turned It into an event more successfully one that lasted for significantly longer than the original did. I say that’s a win for them.
Anything else? Life on Mars, Being Human, The Inbetweeners…?
Robot wars (called battlebots in the US)
Robot Wars is actually an American show and Battlebots is an off-shoot.
Robot Wars was created in America but the first televised show was in the UK.