I'm afraid you have the wrong end of the stick.Wilt Dasney said:The best I can come up with is the difference in how politicians get their jobs. In Britain, the Prime Minister isn't directly elected, but appointed by Parliament (this is how I seem to remember learning it, at least)
There are two main parties that have alternated power for most of the last 100 years - Conservatives and Labour. There is a third which has gone through a few rebranding excericises - The liberals, plus additional Welsh, Scottish and Northern Irish Parties.
We vote our politicians in the same way as you - they stand for election in your home town/ city / region or area of city, depending on size. Each party elects it's own leader, Tony Blair happens to be the current leader of the Labour party. They could ditch him and pick a different leader who would then become the Prime Minister. This is what the Conservatives did with Margaret Thatcher. Maybe that is what has caused the misunderstanding.
As far as how the British humour in regard to politics is different - we are a far more cynical nation than America and this will reflect in our humour. It does in mine, but I'm proud to say that I'm not bigoted - in my eyes everyone has a equal right to have the ______ taken out of them