Many thanks Rossim
I have now got the right answer for 18d and thus the correct answer for 27ac. I finally got 8,22 and 6,5d. As a result I have finished apart from 7d where I have ?R?A?I, though I'm not sure about these crossers.
Like you I haven't been able to parse a lot of them and I do like Paul usually, but I found this one difficult.
I'm off to bed as I've lots to do tomorrow.