Kudos for their removing the story and posting a retraction.
Bad on them for posting it to begin with, a month after the errors were uncovered.
The article, by journalist Victoria Bell, was based on claims made in the journal Nature a month earlier. However, one month before the Mail Online article appeared, the GWPF had revealed the discovery by independent climate scientist Nicholas Lewis that these claims were in error. Lewis’s discovery has since been acknowledged by authors of the Nature paper, which now carries a prominent warning to readers.