Yeah, the author seems to be British - there’s no obvious Brit spellings in this piece, but if you look at https://ianleslie.substack.com/ https://ianleslie.sub

Yeah, the author seems to be British - there’s no obvious Brit spellings in this piece, but if you look at https://ianleslie.substack.com/ https://ianleslie.substack.com/ you’ll see a story excerpt with “favourite”, plus pieces about the BBC and Boris Johnson. Writing in British as opposed to American covers quite a few subtly different shadings of word meanings, as well as a willingness to use words a fourth-grader wouldn’t have encountered.