Do you have a citation for that? People may have said words to that effect in addition to inciting rioting, but no one has been send to jail for saying that.

Okay upon further investigation it does appear I was incorrect about that case. I'm glad to have been, that was very concerning and scary. My mistake.

However there are still some concerning cases - a girl was punished for posting song lyrics:

https://www.bbc.com/news/uk-england-merseyside-43816921

A song lyric containing an offensive racial slur?

"She was given an eight-week community order, placed on an eight-week curfew and told to pay costs of £500 and an £85 victim surcharge."

Not really the same league of punishment as the jailing you made up in your earlier post