Ahh, Kenny Everett. I used to stay up to watch him as a child, was past my bedtime if I recall correctly
"During this time, the BBC received a large number of complaints after Everett told the following joke while live on air. 'When Britain was an Empire we were ruled by an emperor. When we became a kingdom we were ruled by a king. And now we're a country we're ruled by a .....pause ..... Margaret Thatcher." LOL From Wikipedia