https://www.thelondonmagazine.org/wp-content/uploads/2011/01/The-London-Magazine-Style-Guide-2016.pdf Here you go, writers. These guys will drive you to suicide. My god, what do they do all day at their computers, eat chocolates? Harsh, strict but fair, I suppose, But - the 'and' test? If you can replace a comma with 'and' - then do so. That is the end of me. Then - go see the awards for new writing, seems like the awards go to family members and residents of Bloomsbury? One day I'll build my scaffold, my guillotine...
Writing in a strait-jacket and... Erk, they've got ending a sentence with a preposition down as a (style) crime? What's that for?
Well, actually it says ‘And’ test: If you can substitute ‘and’ for the comma it belongs there. which is not the same thing.