I feel like the guardian shouldn't be messing up the oxford comma like that.

The Oxford comma is optional according to the Guardian style guide: https://www.theguardian.com/guardian-style-guide-o

	▲	northisup 3 hours ago \| parent \| next [-]
		So you are saying it _was_ an option and the editor just has bad taste
	▲	worik 24 minutes ago \| parent \| prev \| next [-]
		Ironically the "Oxford comma" is American. The Guardian is English, I am surprised they tolerate it
	▲	Hugsbox 3 hours ago \| parent \| prev [-]
		That may be, but it still hurts readability. It also immediately stuck out to me