Neither did I PDS.
Many thanks to Chris for help especially with 16ac. I'd assumed it was an anagram, but couldn't work out of what. I looked for one with an e in it and solved it with an anagram solver. That made it easier to get 14d and then 14ac. Like Rocky, 7 I finished it, mainly by guessing a word that would fit and then parsing it. I'm still not sure about one or two of my answers, eg 11ac, 12ac, 23d, 3d and 7d, but they'll have to do.
My FOI was 10ac, closely followed by 13ac. My LOI was 7d. My CODs were 13ac and the 14s. I can't say I found it easy, but managed to race through the last lot. I've never heard of that word for a military parade ground in 9ac. Thank goodness there wasn't any football.
Where is Brendan? Thank you to Geeker for starting us off.