If either Thérèse Coffey or Jacob Rees-Smug were my MP (it is Kemi Badenoch instead, and she is not great either) then I would be very tempted to write to them using as many Oxford commas and "unacceptables" (hated by Rees-Smug) as I could shoehorn in. 🤣
Seriously though, I had to look up Oxford comma too despite being a bit of a spelling and grammar pedant. I've never used it because I was always taught that no comma was needed before the "and" at the last item on a list. We didn't learn lots of grammar rules in our school, so that was one of the few.