I have linked you the communications act of 2003, I have linked you examples of cases where people have be prosecuted for speech and you are going on about the current Administration in the United States which is on the other-side of an ocean.
I am asking you when have you met someone in real life that is "far right"? You are unlikely to have done so because there is maybe a few thousand at most in a country of 80 million people.
I have seen the leaked membership details of the BNP. Do you know how many people were in the BNP? IIRC it was less than 500 people for the entire UK.
You are talking as if there are Brown Shirts marching up every UK high street.