Pretty easy, with a theme that even I saw. but I thought it was unusually sloppy for a Brendan.
14a what's the last letter? It parses as one but the definition seems to require another.
20a the wordplay doesn't seem to be in the right order to give the answer.
24a without crossers there are two much more accurate answers than the one needed.
2d and 3d "so-called" in consecutive clues, and it doesn't seem to be needed in 3d.
I very much liked a new way to clue 5d, but COD for me was 8a (well, I am a retired chemistry teacher!)