Very hard this one. Funnily enough I got the theme word and diagonal early on which helped with some of the answers, although the word 'misdemeanour' held me up for quite some time. However I can't make head nor tail of the SW corner, namely 26, 28, 35, 18, 22 and 23. Any hints?
I have an idea about a couple, but like some of the entered ones, I cannot seem to parse them.