Well blow me!
I've finished, though I didn't like some of the clues, especially 24ac and 24d. So,it must have been easier than I first thought. I'd never come across the word for make more concrete before.
This leaves me free to catch up with other things this evening and plant up my tomatoes tomorrow.
My FOI was 6d. My LOI was 24ac and my CODs were 8ac, 16d and 20ac