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.
Honestly, the point of these laws is that they could get rid of anyone they want to. It is not usually enforced (AFAIK). It is there in place to enforce it on people they do not like, at any point.
There have been several high profile cases used as examples, like the guy who was convicted for making a video of his girlfriend’s dog pretending to do a Nazi salute: https://en.m.wikipedia.org/wiki/Mark_Meechan
Doing anything considered “grossly offensive” online can result in the police knocking on your door and financial penalties. It’s a foreign concept if you’re in a country where making jokes online doesn’t constitute a risk to your freedoms and finances (which is more than just the U.S.)