Well, I rate fact checkers less reliable than the Daily Mail based on direct experience of checking both. And this particular story, as expected, has no obvious factual errors.

Well, it's hard to argue against your direct experience without any actual detail. But the paper has consistently been shown up as sensationalised and misleading when it comes to right-wing bugbears such as climate change, COVID, and immigration.

"Shown up" by who?

If you have specific examples of stories on those topic that contain factual errors I'd like to see them.