Poll has Britons in full-throated approval of Corbynism (if not Corbyn)

Hello. Perhaps someone can answer this question for me. The author of this article indicates that Corbyn has been attacked by the left-wing establishment of his party, and the author then provides a link. However, when I clicked on the link, there was no Mention of any left-wing establishment, instead, the discussion is about neo-liberal members of Corbyn’s party. Was the author attempting to be ironic when he termed these people “left-wing”?