Thanks to Everyman. This is one of his highest quality puzzles I can recall. I'd rate it even higher, but 2 clues were oddly familiar from the Indy: 8 in today's (US) #11,001 and 14 in Friday's #11,000! Of course that could be mere chance.
FOI 1a, about a third of the puzzle was write-in and then the challenge picked up.
LOI 23, which I'm not sure about the parsing (American, struggle with rhyming slang).
Too many clues to pick one COD. Really liked 20, 15 (brilliant Spoonerism which was next-to-LOI), 13, 26, 17, 9 and 14. Clues 16, 21, 11 and 22 were also pretty good. Clearly I enjoyed the puzzle, more fun than yesterday's Prize, which was a bit of a slog.
5 was an unfamiliar term to me, perhaps UK slang.