I think this is a great puzzle, really enjoyed it. Many thanks to Everyman.
It took me a while, partly due to how much I drank last night (brother visiting, watching the game). Unlike some others here, I really like 24, so I’m making it my COD. FOI 1a, LOI 12, which I think is a subtractive anagram. Can anyone confirm or correct? I think it uses U as in U and non U.