When a specific page on a major English news website is fil.tered, it must be something interesting. English news websites are rarely fil.tered in Iran, probably because the regime knows a person who reads them can barely be brainwashed by its propaganda. Moreover, such a person usually can find a way to pass fil.tering. I believe the reason for fil.tering this page is mentioned in the article itself:
“His name is always hidden in all of this.”
Link: The Guardian