Many thanks to Geeker and Jono
Once I got 9,1 and 19,18, I raced on , but I have still to get four in the south east corner and 11ac, 6d and 22d.
I still have to work out Jono's hint for 20d, but I am stuck on 11ac and 6d. I get a very strange word as the only option for 11ac, but can't see the parsing, though Geeker gave it earlier on the thread. I'll carry on a bit longer.
Any hints for the latter would be gratefully received.