THanks Brendan
I did in fact get the answer myself after a little thought and having confirmed my answer to 7d. I've checked the cattle now, which helped with13ac. I'd have got 6ac quicker if I stopped looking for "Old instrument".
Thanks for the hint for 20d, Jono I think. I don't like 26ac.
So finished. My LOI was 2ac. CODs 15d, 16d and 27ac
Thank you to Brendan for your sympathy about my back. Unfortunately, it "goes" regularly and usually takes five days to get better. Coincidently, I have an appointment with the spinal people at the hospital this week, though I'm not hopeful as I'm pretty sure it is muscular. I'm already seeing the physios for my tendonitis in my hips. Old age is I suspect the root cause of all my problems