There are also some examples of people being convicted for questionable reasons, but the UK is far from the only country with laws against hate speech. It is really the US that is the outlier in having a fundamental legal guarantee of the right to hate speech.
It’s super easy to find examples if you look for them. In fact, this example from Spain is far worse than any of the examples you’re likely to find in the UK:
https://www.theguardian.com/world/2017/apr/18/student-cassan...
The thing is, it’s not an important part of a certain unmentionable person’s political strategy to portray Spain as an authoritarian hellhole. So you won’t hear nearly as much about cases like this.