Posted without comment. Or with little comment, at least. This from Descent into Avernus.
Depends which style guide you use. In the UK The Oxford Style Manual and the MHRA Style Guide both recommend using it, while the Guardian Style Guide, The Cambridge Guide to English Usage, Fowler's Dictionary, and New Hart's Rules consider it discretionary.Despite it's name, the Oxford comma is an Americanism, and is considered incorrect in the UK.
That's overstating the matter Paul. Oxford commas are absolutely not "considered incorrect" in the UK. It may be considered unnecessary, or less than ideal, by certain style guides, particularly for journalistic writing, but "incorrect" is going far too far. You also frequently see it used in UK legal documents. It's like people claiming - ize is "incorrect". It is not. It is less widely used, but it's still acceptable (your specific organisation may prefer a more standard form of course).Despite it's name, the Oxford comma is an Americanism, and is considered incorrect in the UK. The purpose of punctuation is to clarify meaning. If the presence or absence of the punctuation mark does not change the meaning then it serves no purpose and should be omitted.