Thus, hence, and therefore are going to be used more in British English, I would imagine. In common everyday United States English, they aren't used that much. It is a formal way of speaking.
I am revoking your license, hence, you cannot drive your automobile.
The court has decided to deny frogs the right to vote, therefore, no frogs may come into the courthouse.
I have spoken, thus saith the Lord, thou shalt have no other gods before me.
I hope a Brit answers this question. They speak so eloquently.