You posted an excerpt.
Should have remembered to click that excerpt button before posting.
If the program prompts me to click the excerpt button I do (otherwise it won’t post). If not, I usually don’t and instead type in the word SNIP at the end of the excerpt.
However, I think the Guardian is required to be excerpted here ... so I would have gotten that prompt and would have checked the excerpt button. I’d be surprised if it is not on the to-be-excerpted list. I’ll have to wait to post another article from the Guardian to be sure if that is the case.